Fibromyalgia

Reviewed by Dr C. J. Odike, MRCGP

Fibromyalgia is a long term condition involving widespread pain, fatigue, unrefreshing sleep and cognitive difficulty. The pain is real, but it is not caused by inflamed joints or progressive tissue damage. Diagnosis is clinical, using the overall symptom pattern while investigating alternative or coexisting conditions in a proportionate way.

What fibromyalgia is Fibromyalgia is a long term condition characterised by persistent widespread pain together with symptoms such as fatigue, unrefreshing sleep and difficulty thinking clearly. It is classified as a chronic primary pain condition. This means that altered pain processing is itself an important part of the illness rather than pain being explained completely by damaged tissue or another disease. Fibromyalgia can affect physical function, concentration, work, relationships and emotional wellbeing. The severity and combination of symptoms vary considerably between people. Symptoms usually fluctuate. You may have periods when pain and fatigue are more manageable and periods when they become much more intrusive. Fibromyalgia does not progressively destroy your joints, muscles or internal organs. It can still cause substantial disability and deserves active, respectful treatment. Fibromyalgia is not an inflammatory arthritis Fibromyalgia does not primarily result from inflammation within muscles or joints. It does not cause the persistent synovitis, joint erosion or autoimmune tissue injury seen in conditions such as rheumatoid arthritis. A joint can feel painful, stiff or swollen even when there is no visible inflammatory swelling. Altered sensory processing can make ordinary pressure or movement feel painful. This distinction affects treatment. Anti inflammatory medicines do not usually address the main mechanism of fibromyalgia pain. A person can have fibromyalgia and inflammatory arthritis together. New joint swelling must still be examined rather than automatically attributed to fibromyalgia. Pain does not always measure tissue damage Pain is a protective experience produced by the nervous system. It is influenced by sensory signals, previous experience, attention, sleep, mood and the surrounding context. Acute pain often warns of injury or inflammation. Chronic pain can continue after tissues have healed or when tissue changes do not fully explain the severity and distribution of symptoms. In fibromyalgia, the nervous system becomes unusually responsive to sensory input. Signals that would usually be mild can be amplified or interpreted as threatening. Severe pain remains genuine even when scans do not show severe structural damage. Understanding this does not mean ignoring new symptoms. It explains why pain and tissue injury are related but are not always proportional. Nociplastic pain Fibromyalgia pain is often described as nociplastic pain. Nociplastic pain occurs when pain processing systems function differently, without sufficient evidence that ongoing tissue damage or a specific nerve lesion fully explains the pain. This differs from nociceptive pain caused mainly by tissue injury or inflammation. It also differs from neuropathic pain caused by a lesion or disease affecting the somatosensory nervous system. These mechanisms can overlap. Someone may have fibromyalgia alongside osteoarthritis, nerve pain or an inflammatory condition. The term nociplastic describes a pain mechanism. It does not imply that the symptoms are imagined or deliberately produced. Central sensitisation Central sensitisation is one proposed mechanism contributing to fibromyalgia. The term describes increased responsiveness within the brain and spinal cord to sensory signals. A mildly painful stimulus may feel much more intense than expected. A normally non painful stimulus, such as light pressure, may become painful. Pain inhibiting pathways may also function less effectively. The nervous system may have greater difficulty turning down repeated or persistent signals. Central sensitisation is a useful explanatory model, but fibromyalgia biology is complex. It should not be presented as one fully proven process explaining every symptom. Peripheral and wider nervous system changes Research also suggests that peripheral sensory pathways may contribute in some people. Some studies have identified altered small fibre structure or signalling in subgroups of people with fibromyalgia. Autonomic nervous system regulation may also differ, contributing to symptoms such as dizziness, temperature sensitivity or palpitations. Sleep, stress response and neurochemical systems can influence pain sensitivity and fatigue. These findings support fibromyalgia as a biological condition. They are not currently used as routine diagnostic tests because no single abnormality is present in everyone. Fibromyalgia is not all in your head Fibromyalgia has historically been misunderstood because routine blood tests and scans are often normal. Some people have been told that nothing is wrong, they are coping badly or the pain is psychological. These statements are inaccurate and harmful. Normal structural tests do not show that the nervous system is processing sensory information normally. Psychological experiences can influence pain, just as pain can influence mood and behaviour. This interaction occurs in all pain conditions. It does not mean that fibromyalgia is caused by weakness, poor character or a decision to focus on symptoms. Why validation matters Living with unexplained symptoms can involve repeated appointments, disbelief and pressure to prove that you are unwell. A clear diagnosis can reduce uncertainty and unnecessary repeated testing. It can also provide a framework for treatment and self management. Validation means recognising that your symptoms and their effects are real. It does not require pretending that one treatment will remove every symptom. A useful explanation should offer hope without promising a cure. It should also leave room to investigate new or atypical symptoms. Trust between you and your healthcare team is an active part of effective care. Widespread pain Widespread pain affects several body regions rather than one isolated joint or muscle. The pain may involve the neck, shoulders, back, chest, arms, hips or legs. It can occur on both sides and above and below the waist. The location and character may change. Pain may feel aching, burning, stabbing, throbbing or unusually tender. Some areas may be consistently painful while others become more noticeable during flares. Current diagnostic criteria require a generalised distribution rather than pain limited to one side or one body region. Symptoms lasting at least three months Fibromyalgia is a chronic condition. Diagnostic criteria require symptoms to have been present at a similar level for at least three months. This duration separates a persistent syndrome from a short lived illness, injury or temporary period of poor sleep. The symptoms do not need to be identical every day. Fibromyalgia commonly fluctuates. Three months is a diagnostic threshold rather than a reason to delay appropriate assessment of significant symptoms. Red flags, objective abnormalities or rapid deterioration should be investigated promptly regardless of symptom duration. Tenderness and sensitivity Many people with fibromyalgia experience tenderness across muscles and soft tissues. Pressure that would usually feel neutral may feel uncomfortable or painful. This is called allodynia when a normally non painful stimulus causes pain. Hyperalgesia means that a painful stimulus feels more painful than expected. Sensitivity can extend beyond touch. Noise, bright light, heat, cold or strong smells may become difficult to tolerate. These symptoms reflect altered sensory processing rather than damage at every painful site. Fatigue Fibromyalgia fatigue is often more than ordinary tiredness after activity. You may feel physically heavy, mentally exhausted or unable to restore energy through rest. Fatigue can limit work, household tasks, social activity and exercise. It may vary independently from pain. Poor sleep, low mood, anaemia, thyroid disease, sleep apnoea and medicines can add to fatigue and should be considered. Fatigue should not be treated as evidence that you are lazy or unmotivated. Unrefreshing sleep You may sleep for several hours but wake feeling as though you have not rested. Pain can interrupt sleep, while poor sleep can increase pain sensitivity the following day. This can create a reinforcing cycle involving pain, fatigue, reduced activity and further sleep disruption. Insomnia, restless legs syndrome and obstructive sleep apnoea can coexist with fibromyalgia. Snoring, witnessed pauses in breathing, morning headaches or severe daytime sleepiness should prompt assessment for sleep apnoea rather than being attributed automatically to fibromyalgia. Fibro fog The term fibro fog describes cognitive symptoms associated with fibromyalgia. You may struggle with concentration, word retrieval, short term memory, planning or switching between tasks. Cognitive performance may worsen during severe pain, fatigue, stress or poor sleep. Sedating medicines can add to the problem. Hearing, vision, depression, thyroid disease and other neurological conditions may also affect cognition. Fibro fog is frustrating but does not usually represent progressive dementia. Mood symptoms Anxiety and depression are more common in people with fibromyalgia and other chronic pain conditions. Pain, sleep disruption, reduced independence and invalidation can contribute to psychological distress. Shared biological pathways may also influence pain and mood symptoms. Depression does not explain away widespread pain. Fibromyalgia can occur without depression, and depression requires treatment in its own right when present. Assessment should include hopelessness and self harm risk because chronic pain can place a substantial burden on mental health. Stiffness You may feel stiff on waking, after sitting or when beginning an activity. The stiffness can be widespread and may last longer than the brief gelling associated with osteoarthritis. Unlike inflammatory arthritis, fibromyalgia stiffness is not usually accompanied by persistent hot, objectively swollen joints. Subjective swelling is common. Hands or feet may feel puffy despite no visible synovitis on examination. Persistent objective swelling, warmth or restricted joint movement requires assessment for another or additional condition. Headaches and facial pain Migraine and tension type headaches commonly overlap with fibromyalgia. Pain may also affect the jaw, face or temples. Temporomandibular disorders can cause jaw tenderness, clicking and pain during chewing. Headache patterns still require their own assessment. A sudden severe headache or a new neurological deficit is not explained by fibromyalgia. Jaw pain in someone over 50 with scalp tenderness, visual symptoms or pain while chewing can indicate giant cell arteritis and requires urgent assessment. Treatment should distinguish a specific headache or jaw disorder from generalised pain sensitisation. Irritable bowel syndrome Irritable bowel syndrome commonly overlaps with fibromyalgia. It can cause abdominal pain related to bowel movements, bloating, diarrhoea, constipation or a mixed pattern. Both conditions involve altered sensory processing and interactions between the nervous system and internal organs. Rectal bleeding, unexplained weight loss, anaemia, a persistent abdominal mass or a major change in bowel habit requires separate investigation. Fibromyalgia should never be used to dismiss gastrointestinal red flags. Bladder and pelvic symptoms Some people experience urinary urgency, pelvic discomfort or bladder pain alongside fibromyalgia. Pelvic floor muscle overactivity and other chronic pelvic pain conditions can coexist. Urinary infection, blood in the urine, retention and gynaecological or urological disease still require appropriate assessment. Symptoms should be discussed openly because embarrassment can delay effective support. A multidisciplinary approach may include continence, pelvic health or pain specialists according to the pattern. Temporomandibular pain The temporomandibular joints connect the lower jaw to the skull. Pain may arise from the joint, chewing muscles, tooth grinding or wider pain sensitisation. Symptoms can include facial aching, jaw fatigue, clicking or difficulty opening the mouth. Dental disease, infection and inflammatory arthritis can produce similar symptoms. Management may involve dental assessment, jaw relaxation, avoidance of prolonged clenching and treatment of sleep or stress contributors. ME/CFS overlap Myalgic encephalomyelitis, also called chronic fatigue syndrome, can overlap with fibromyalgia. Some people meet diagnostic criteria for both conditions. Fibromyalgia usually centres on widespread pain with fatigue and unrefreshing sleep. ME/CFS requires a characteristic pattern including post exertional malaise. Post exertional malaise means symptoms worsen disproportionately after physical, cognitive, emotional or social activity, often after a delay and with prolonged recovery. When fatigue or post exertional symptom worsening is prominent, a specific ME/CFS assessment is important because activity management differs. Exercise advice when ME/CFS is possible Exercise is an evidence based component of fibromyalgia management, but it must be individualised. A fixed programme that increases activity automatically regardless of symptoms is inappropriate when ME/CFS is present or strongly suspected. NICE advises against graded exercise therapy using predetermined incremental increases for ME/CFS. People with ME/CFS may need energy management within an individually established limit and specialist oversight. This distinction prevents well intended fibromyalgia exercise advice from worsening a coexisting condition. Hypermobility and chronic pain Joint hypermobility and hypermobility spectrum disorders can overlap with fibromyalgia. Unstable joints, repeated sprains and muscle overactivity can provide ongoing pain signals. Some people have both a connective tissue condition and widespread nociplastic pain. The presence of hypermobility does not explain every symptom automatically. Cardiovascular, skin, autonomic and family features may require separate assessment. Rehabilitation may need greater emphasis on control, stability and gradual strengthening rather than stretching already mobile joints. Other chronic pain conditions Fibromyalgia can coexist with osteoarthritis, inflammatory arthritis, endometriosis, back pain and neuropathic pain. The diagnosis does not cancel an established source of tissue or nerve pain. Different pain mechanisms may require different treatments within the same person. For example, an inflamed rheumatoid joint still needs disease modifying treatment even when fibromyalgia amplifies overall pain sensitivity. Recognising overlapping mechanisms can prevent both undertreatment of disease and unnecessary escalation of invasive procedures. Who develops fibromyalgia Fibromyalgia can affect people of any sex and age, although it is diagnosed more often in women. The sex difference may reflect biological risk, healthcare access, diagnostic practices and the limitations of older criteria. Symptoms often begin in early or middle adulthood but can occur in younger and older people. Fibromyalgia can run in families, suggesting inherited susceptibility alongside shared environmental factors. No single demographic characteristic is sufficient to confirm or exclude the condition. Stress as a risk factor or trigger Long term stress and major distressing events are associated with increased fibromyalgia risk in some people. Stress can alter sleep, muscle tension, autonomic regulation and pain processing pathways. A stressful event may precede symptom onset or a flare. Many people develop fibromyalgia without an identifiable emotional trigger. The association does not mean the person reacted incorrectly or caused the illness through poor coping. Stress management can help symptoms without implying that stress is the sole cause. Physical trauma Symptoms sometimes begin after physical trauma such as a road collision, serious injury or operation. An initial local pain problem may become more widespread as pain processing systems change. The timing can be clinically meaningful, but it does not always prove that one event caused every later symptom. Structural injury should be treated appropriately. Persistent widespread pain may require a broader rehabilitation strategy after tissues have healed. Repeated procedures aimed at one region may be unhelpful when nociplastic pain is a major contributor. Infection and illness Some people report fibromyalgia beginning after an infection or significant physical illness. Immune activation, sleep disruption, reduced activity and stress system changes may contribute in susceptible people. Persistent symptoms after an infection may also fit long COVID, ME/CFS or another post infectious syndrome. Ongoing fever, weight loss, objective weakness or abnormal inflammatory markers require investigation rather than a default fibromyalgia label. The absence of one clear trigger does not make the condition less valid. Sleep disorders as contributors Chronic sleep disruption can increase pain sensitivity and impair recovery. Insomnia may develop because pain makes it difficult to settle, remain asleep or find a comfortable position. Obstructive sleep apnoea, restless legs syndrome and circadian disruption can worsen fibromyalgia symptoms. Treating a sleep disorder may improve fatigue, cognition and pain tolerance even when fibromyalgia remains present. A sleep history is therefore an important part of assessment rather than an optional extra. Other established pain conditions A persistent regional pain condition can increase the likelihood of widespread sensitisation. This may occur with arthritis, chronic back pain, migraine, pelvic pain or repeated injuries. It does not mean that everyone with long term pain develops fibromyalgia. The transition reflects a combination of biological susceptibility, sleep, stress, activity and ongoing sensory input. Early rehabilitation and effective pain management may reduce disability even when the underlying condition cannot be removed completely. There is no single fibromyalgia test No blood test, scan, biopsy or electrical study confirms fibromyalgia. Routine tests are often normal because fibromyalgia does not primarily damage joints, muscles or organs. Normal results are compatible with the diagnosis. They do not show that the symptoms are fabricated. Tests are used to identify other conditions suggested by what the person describes or the examination. The absence of a specific biomarker makes a careful clinical assessment more important, not less scientific. Diagnosis is clinical Diagnosis is based on the pattern, duration and impact of symptoms together with physical examination. The clinician asks where pain occurs, how long it has been present and how fatigue, sleep and cognitive symptoms affect your life. They look for a generalised pattern rather than one isolated painful region. The assessment also identifies features suggesting inflammatory, endocrine, neurological, muscular, malignant or sleep related disease. A clear compatible pattern can be diagnosed in primary care without automatic referral to rheumatology. Fibromyalgia is not a diagnosis of exclusion Fibromyalgia is sometimes described as a diagnosis of exclusion. Current UK guidance states that this description is inaccurate. A positive clinical pattern supports the diagnosis. You do not need every conceivable disease to be excluded first. Clinicians should still investigate plausible alternatives and red flags. The aim is targeted assessment rather than an endless series of scans, antibody panels and specialist referrals. Fibromyalgia can also coexist with another diagnosis, so finding one condition does not automatically invalidate the fibromyalgia pattern. The history A detailed history explores the distribution, quality and duration of pain. The clinician asks about fatigue, unrefreshing sleep, cognitive difficulty, headaches, abdominal symptoms and mood. They assess daily function, work, caring roles, physical activity and the effect on relationships. Questions about fever, weight loss, joint swelling, rashes, muscle weakness, neurological symptoms and medicine exposure guide the differential diagnosis. Previous investigations and treatments are reviewed to avoid unnecessary repetition and identify medicine related harm. The examination The examination should be respectful and proportionate because touch may be painful. The clinician assesses joints for synovitis, warmth, effusion, deformity and restricted movement. They evaluate muscle power, reflexes, sensation, gait and coordination when neurological or muscular disease is possible. Skin, thyroid, cardiovascular and general findings may provide clues to another condition. Widespread tenderness can support the overall pattern but is not sufficient by itself. Tender points were historically used The 1990 American College of Rheumatology criteria required pain at at least 11 of 18 specified tender points. This approach depended heavily on examination technique and did not capture fatigue, sleep or cognitive symptoms adequately. It could miss people whose tenderness fluctuated or whose main disability came from other fibromyalgia features. Current criteria no longer require a tender point count. Clinicians may still assess tenderness, but pressing a fixed set of points is not the modern diagnostic method. Widespread Pain Index The Widespread Pain Index, or WPI, records the number of body areas affected by pain. The current worksheet considers 19 possible painful areas. The WPI measures distribution rather than pain intensity. A high number indicates a broad pain pattern. The body map also helps confirm that pain is generalised across multiple regions. It should support a clinical conversation rather than become a self diagnosis score used without context. Symptom Severity Scale The Symptom Severity Scale, or SSS, measures the severity of fatigue, cognitive difficulty and waking unrefreshed. It also records whether headache, depression and lower abdominal pain or cramps have occurred. The score recognises that fibromyalgia is not defined by pain alone. A person can experience major disability from fatigue or cognitive symptoms even when pain intensity varies. The scale does not replace assessment for depression, sleep disease or gastrointestinal pathology. Current diagnostic thresholds The 2016 criteria support fibromyalgia when the WPI is at least 7 and the SSS is at least 5. They also support the diagnosis when the WPI is between 4 and 6 and the SSS is at least 9. Pain must be generalised across at least four of five body regions and symptoms must have been present for at least three months. These criteria assist diagnostic consistency. They do not mean that everyone near a numerical threshold has an identical illness. The clinician still decides whether the whole presentation is appropriate and whether another condition needs attention. Screening tests UK diagnostic guidance supports a limited set of screening tests to identify important alternatives. These may include a full blood count, kidney and liver function, blood glucose, thyroid stimulating hormone, creatine kinase, ESR and C reactive protein. The exact panel depends on local pathways and the symptoms and background. Normal results support the absence of anaemia, major inflammation, muscle breakdown or thyroid dysfunction but do not directly prove fibromyalgia. Further tests should follow a specific clinical suspicion rather than being ordered routinely. Avoiding excessive testing Repeated broad testing can produce incidental borderline results that create anxiety without explaining symptoms. Antinuclear antibodies, rheumatoid factor and other immune tests can be positive in healthy people. MRI scans commonly show age related changes that may not cause widespread pain. Once a well supported diagnosis has been made, tests should not be repeated automatically whenever symptoms fluctuate. New objective signs or a clearly changed symptom pattern should still prompt fresh assessment. Inflammatory arthritis Rheumatoid arthritis and other inflammatory arthritides can cause pain, fatigue and morning stiffness. The key clue is objective inflammation, including persistent soft joint swelling, warmth or synovitis. Rheumatoid arthritis often affects several small joints of the hands or feet and may be symmetrical. Inflammatory markers can be raised, although normal markers do not completely exclude inflammatory arthritis. Fibromyalgia can coexist with rheumatoid arthritis and can increase pain despite good control of joint inflammation. Polymyalgia rheumatica Polymyalgia rheumatica usually develops after age 50 and causes pain and marked stiffness around the shoulders and hips. Morning stiffness is often prolonged, and everyday tasks such as dressing or raising the arms become difficult. Inflammatory markers are usually raised, although exceptions occur. True muscle strength may be preserved despite pain limited movement. New headache, scalp tenderness, jaw pain while chewing or visual symptoms can indicate associated giant cell arteritis and require urgent assessment. Hypothyroidism An underactive thyroid can cause fatigue, slowed thinking, low mood, muscle aching, constipation and cold intolerance. These symptoms can overlap with fibromyalgia. A thyroid stimulating hormone test is commonly included in initial screening. Treating confirmed hypothyroidism may improve symptoms, but thyroid disease and fibromyalgia can coexist. A borderline result should be interpreted using thyroid hormone levels, symptoms and clinical guidance rather than assumed to explain all pain. Vitamin D deficiency Vitamin D deficiency can contribute to bone pain, muscle discomfort and proximal weakness when severe. Risk is influenced by limited sunlight exposure, darker skin, covering most skin, malabsorption and some medicines. Routine vitamin D testing for every possible fibromyalgia presentation is not consistently recommended. Testing is appropriate when clinical features or risk factors make deficiency plausible. Correcting a deficiency supports bone and muscle health but does not reliably cure established fibromyalgia. Muscle disease Inflammatory or metabolic muscle disease can cause muscle discomfort and weakness. The key symptom is often objective weakness rather than pain alone. Examples include difficulty rising from a chair, climbing stairs or lifting the arms. Creatine kinase can support investigation when muscle disease is suspected. A normal creatine kinase does not exclude every neuromuscular disorder. Progressive focal or proximal weakness requires assessment rather than attribution to deconditioning or fibromyalgia. Neurological disease Neurological conditions can cause pain, fatigue, altered sensation and walking difficulty. Focal weakness, abnormal reflexes, a clear sensory level, visual loss, bladder dysfunction or impaired coordination are not typical fibromyalgia findings. Pins and needles can occur in fibromyalgia, but a consistent anatomical pattern may indicate neuropathy or nerve compression. MRI or neurological referral is not routinely required without specific concern. New objective neurological signs should trigger appropriate investigation even after fibromyalgia has been diagnosed. Anaemia and systemic illness Anaemia can cause fatigue, breathlessness, palpitations and reduced exercise tolerance. A full blood count helps identify anaemia and some haematological abnormalities. Unexplained weight loss, fever, night sweats or persistently abnormal blood counts require wider assessment. Chronic infection, inflammatory disease and malignancy can occasionally present with pain and fatigue. Fibromyalgia should not be used to normalise progressive constitutional symptoms. Medicine related symptoms Some medicines can contribute to fatigue, cognitive slowing, muscle pain or increased pain sensitivity. Examples include sedating medicines, some lipid lowering drugs, aromatase inhibitors and long term high dose opioids. Opioid induced hyperalgesia means that opioid exposure may paradoxically increase pain sensitivity in some people. A medication review considers benefit, adverse effects, interactions and withdrawal risk. Medicines associated with dependence should not be stopped abruptly without a supported plan. Education is the first treatment A clear explanation helps you understand why pain can be severe without ongoing tissue damage. Education should reduce fear rather than suggest that you must ignore pain. The diagnosis can help you move away from repeated searches for hidden structural damage while remaining alert to genuinely new signs. Treatment is usually more effective when goals focus on function, sleep and participation as well as pain intensity. Understanding the condition also helps family members and employers respond more constructively. Shared goals A complete absence of pain may not be immediately achievable. Goals can include walking farther, returning to a valued activity, sleeping more consistently or reducing medication related fogginess. Small functional gains can be clinically meaningful even when pain remains present. Goals should be specific, realistic and chosen with you rather than imposed by a service. They are reviewed during flares and adjusted as your circumstances change. Physical activity Regular physical activity is a core component of fibromyalgia management. Exercise can improve pain, physical function, mood, sleep and quality of life over time. The best activity is one that is accessible, tolerable and sustainable. Walking, cycling, swimming, water based exercise and strength training can all be considered. The starting point should reflect your current ability rather than a standard fitness expectation. Activity is treatment, not punishment for being inactive. Gradual progression Exercise often needs to begin below the level that repeatedly causes prolonged symptom flares. Duration, frequency or intensity can then increase gradually according to response. Only one element may need to change at a time. Recovery days and temporary reductions can be part of the plan. A short term increase in manageable soreness does not necessarily indicate injury. A severe or prolonged flare suggests that the progression was too large. Gradual progression is flexible and individualised, not a rigid demand to increase activity every week. Pacing Pacing aims to balance activity and recovery across the day and week. You may alternate physical and cognitive tasks, divide larger activities and plan rest before complete exhaustion. Pacing is not permanent avoidance of all difficult activity. It creates a more stable base from which activity can expand when possible. The boom and bust pattern involves doing a large amount on a better day and then needing prolonged recovery. Reducing this cycle can make function more predictable without requiring every day to look the same. Strength training Strengthening supports daily tasks, joint control and confidence in movement. It can begin with light resistance, body weight movements or functional activities such as supported sit to stand practice. The programme should progress slowly because post exercise symptoms can be delayed. Technique and regularity are more important than lifting heavy loads. A physiotherapist can adapt exercise when there is hypermobility, arthritis, balance difficulty or fear of movement. Aerobic exercise Aerobic exercise uses large muscle groups and raises breathing and heart rate. Walking, cycling, dancing and water based activity are common options. Short intervals may be more manageable than one continuous session at first. Intensity can be guided by symptoms and the ability to speak rather than competitive targets. Cardiovascular symptoms, significant breathlessness or fainting require assessment before progression. Supervised exercise programmes NICE recommends offering a supervised group exercise programme for chronic primary pain, adapted to needs, preferences and ability. Supervision can build confidence, improve technique and support gradual progression. A group setting may provide social support but will not suit everyone. Individual physiotherapy may be more appropriate when disability, comorbidity or sensory sensitivity makes a group difficult. The programme should support long term independent activity rather than create dependence on indefinite supervised sessions. Cognitive behavioural therapy Cognitive behavioural therapy for pain explores how thoughts, emotions, behaviour and symptoms influence each other. It can support pacing, problem solving, sleep, communication and responses to flares. CBT does not mean that pain is caused by incorrect thinking. It aims to reduce distress and improve function despite a persistent health condition. NICE recommends considering CBT for pain when delivered by a suitably trained professional. Acceptance and commitment therapy Acceptance and commitment therapy, or ACT, helps you respond differently to difficult thoughts and symptoms while moving towards personally important activities. Acceptance does not mean approving of pain, giving up or refusing medical care. The approach aims to reduce the amount of life organised solely around avoiding symptoms. ACT can support psychological flexibility, values based goals and adaptation to uncertainty. NICE recommends considering ACT for chronic primary pain. Relaxation and stress regulation Relaxation techniques may reduce muscle tension and autonomic arousal. Options include paced breathing, progressive muscle relaxation, mindfulness and guided imagery. These methods do not remove the biological reality of fibromyalgia. They can provide one way to reduce symptom amplification during stress or before sleep. A technique that increases distress or trauma symptoms should be modified or stopped with appropriate support. Sleep management Sleep treatment begins with identifying the specific problem rather than giving generic advice alone. A consistent waking time, reduced late caffeine and a suitable wind down routine may help insomnia. The sleeping environment should account for pain, temperature sensitivity and sensory needs. Long daytime sleep can disrupt night sleep, but planned brief rest may be necessary for some people. Persistent insomnia may benefit from cognitive behavioural therapy for insomnia, while suspected sleep apnoea requires specific assessment. Medicines have modest average benefits No medicine cures fibromyalgia. Average improvements in trials are usually modest, and not everyone responds. A medicine may be considered when a particular symptom, such as pain, poor sleep or depression, remains intrusive despite non drug care. One medicine should be trialled with a defined goal and review date. Treatment should stop gradually when there is no meaningful benefit or adverse effects outweigh improvement. Adding several sedating medicines can worsen fatigue, cognition, falls and driving safety. Antidepressants for chronic primary pain NICE advises considering selected antidepressants for adults with chronic primary pain after discussing benefits and harms. Options include amitriptyline, duloxetine, citalopram, fluoxetine, paroxetine and sertraline. These medicines may support pain, sleep, quality of life and psychological distress even when you do not have depression. Use for chronic pain may be off label depending on the medicine and current licensing. The choice depends on symptoms, other conditions, interactions, pregnancy considerations and previous response. Amitriptyline Amitriptyline is a tricyclic antidepressant often used at lower doses for pain or sleep than for depression. It may help some people with sleep quality and pain, but benefit is not guaranteed. Common adverse effects include dry mouth, constipation, blurred vision, drowsiness and difficulty passing urine. It can affect heart rhythm and increase falls or confusion, particularly in older adults. A low starting dose and planned review help limit unnecessary long term use. Duloxetine Duloxetine is a serotonin and noradrenaline reuptake inhibitor. It may improve pain and mood in some people and can be useful when depression or anxiety coexists. Possible adverse effects include nausea, sweating, sleep disturbance, sexual dysfunction and raised blood pressure. It can interact with other serotonergic medicines and is not suitable in some liver or kidney conditions. Stopping suddenly can cause withdrawal symptoms, so dose reduction should be gradual and supervised. Other antidepressants Selective serotonin reuptake inhibitors may help mood, distress or sleep in selected people. Their direct pain benefit is variable and generally modest. Side effects can include gastrointestinal symptoms, sexual dysfunction, sleep change and emotional blunting. Some combinations increase the risk of serotonin syndrome or bleeding. Choice should follow the person's symptom priorities rather than assuming all antidepressants work identically. Pregabalin and fibromyalgia Pregabalin has shown modest benefit for pain or sleep in some international fibromyalgia studies and is licensed for fibromyalgia in some countries. Current NICE guidance for chronic primary pain in England advises not initiating gabapentinoids, including pregabalin, for routine management. This means pregabalin is not a standard first line fibromyalgia medicine within that guidance, despite differing international recommendations. Possible harms include dizziness, sleepiness, swelling, weight gain, dependence, withdrawal and respiratory depression in susceptible people. Someone already taking pregabalin should have benefit and harms reviewed through shared decision making rather than stopping it abruptly. Gabapentinoid safety Pregabalin and gabapentin are controlled medicines in Great Britain because of misuse and dependence risks. Breathing suppression is more likely with opioids, other sedatives, respiratory disease, kidney impairment or older age. The dose requires adjustment when kidney function is reduced. Withdrawal can cause anxiety, insomnia, sweating, pain and other symptoms. A tapering plan should be individualised when treatment is reduced or stopped. Anti inflammatory medicines NSAIDs target inflammatory pathways and can help a separate inflammatory or musculoskeletal condition. They have limited evidence for fibromyalgia itself because fibromyalgia is not primarily driven by joint or muscle inflammation. Regular NSAID use can cause gastrointestinal bleeding, kidney injury, fluid retention and cardiovascular harm. Paracetamol also has limited evidence for chronic primary pain. These medicines should not continue automatically when they provide no meaningful functional benefit. Opioids should be avoided NICE advises not initiating opioids for chronic primary pain. Long term opioids often provide limited sustained improvement in fibromyalgia and can cause constipation, sleepiness, cognitive impairment and falls. Tolerance and dependence can develop, making dose reduction difficult. Opioid induced hyperalgesia may increase pain sensitivity in some people. If you already take opioids, they should be reviewed carefully and reduced gradually when appropriate rather than stopped suddenly. Why escalating analgesia can fail Fibromyalgia pain does not arise from one damaged structure that becomes quiet when stronger analgesia is applied. Increasing sedating medicine can reduce alertness and activity without producing meaningful pain relief. Reduced movement and poorer sleep architecture can then worsen function. A medication review should distinguish temporary sedation from genuine improvement in daily life. Successful treatment often combines several modest interventions rather than relying on one increasingly strong drug. Avoiding unnecessary procedures Injections, operations and repeated imaging do not treat widespread nociplastic pain directly. A person with fibromyalgia can still need surgery for a clearly identified condition such as severe osteoarthritis. The expected benefit should relate to the specific structural problem rather than an assumption that surgery will remove all pain. Widespread pain may influence rehabilitation and the risk of persistent postoperative pain. Realistic consent and coordinated postoperative planning are therefore important. Multidisciplinary care Fibromyalgia affects several areas of life, so one professional may not meet every need. Primary care can coordinate diagnosis, medicine review and investigation of new symptoms. Physiotherapists support movement, strength, pacing and confidence. Occupational therapists address daily activities, work and practical adaptation. Psychologists can provide CBT, ACT or support for trauma, mood and adjustment when appropriate. Pain services, sleep specialists, dietitians and rheumatologists may contribute according to complexity and local pathways. Occupational therapy and daily function Occupational therapy focuses on the activities that matter to you. Tasks can be simplified, divided or adapted to reduce unnecessary effort. Workplace changes may include flexible hours, altered duties, movement breaks or ergonomic equipment. Assistive equipment should preserve independence rather than encourage avoidable inactivity. Energy, pain and cognitive demands should all be considered when planning a routine. Work and reasonable adjustments Fibromyalgia can affect attendance, concentration, stamina and tolerance of fixed postures. Symptoms may not be visible to colleagues, which can create misunderstanding. A fit note can describe functional limits rather than simply stating that you are unable to work. Occupational health input can help identify temporary or long term adjustments. Remaining in suitable work can support identity and wellbeing, but unsafe or unrealistic demands may need modification. Flare management A flare is a temporary increase in pain, fatigue or other symptoms. Possible contributors include poor sleep, illness, increased activity, stress or no identifiable trigger. The response may include reducing activity temporarily, protecting sleep and using established coping strategies. Complete bed rest usually worsens stiffness and physical capacity if prolonged. Once symptoms stabilise, activity can return gradually from a realistic baseline. Self management is supported care Self management does not mean that healthcare services withdraw because no cure exists. It means developing skills and routines that give you more influence over symptoms and function. Useful skills include pacing, exercise planning, sleep strategies, stress regulation and deciding when new symptoms need assessment. Professional review remains important when the diagnosis is uncertain, treatments cause harm or function deteriorates. The goal is partnership rather than transferring all responsibility to the person in pain. Diet and supplements No specific diet has been shown to cure fibromyalgia. A balanced diet supports general health, energy and management of conditions such as diabetes or irritable bowel syndrome. Restrictive diets can cause nutritional deficiency, financial cost and increased focus on symptoms. Vitamin or mineral replacement is appropriate when deficiency is confirmed or strongly suspected. Supplements marketed as detoxifying the nervous system should be approached cautiously because evidence and quality control may be limited. Prognosis Fibromyalgia is usually a chronic, fluctuating condition rather than a steadily destructive disease. Symptoms may persist for years, but their impact can change substantially. Some people experience major improvement, while others continue to have significant disability despite treatment. Early explanation, active rehabilitation, sleep care and reduction of unhelpful medicine burden can improve outcomes. A realistic prognosis combines honesty about chronicity with evidence that function and quality of life can improve. Improvement does not require a cure You may become able to work, exercise or participate more even when some pain remains. Sleep and cognitive symptoms may improve at a different rate from pain. Flares do not necessarily mean that the overall condition is worsening permanently. Progress is rarely linear. A temporary setback can lead to adjustment rather than abandonment of the plan. Measuring valued activities often provides a more useful picture than tracking pain intensity alone. New symptoms still need assessment Once fibromyalgia is diagnosed, there is a risk that every later symptom is attributed to it. This is called diagnostic overshadowing. Fibromyalgia does not prevent infection, cancer, inflammatory arthritis, neurological disease or another condition from developing. New objective weakness, synovitis, weight loss, night sweats or abnormal test results should be evaluated normally. A stable diagnosis should reduce unnecessary repeated investigation, not create a rule that nothing new can be wrong.

Fibromyalgia is a real chronic pain condition involving altered nervous system processing rather than inflamed or progressively damaged joints. Diagnosis is based on a positive pattern of widespread pain and associated symptoms, while treatment focuses on validation, individualised activity, psychological and sleep support, and cautious use of medicines with modest benefits.

Medical words made simple

Fibromyalgia
A long-term condition involving widespread pain, fatigue, unrefreshing sleep and other symptoms linked with altered pain and sensory processing.
Chronic primary pain
Pain lasting or recurring for more than three months that causes distress or disability and is not better explained completely by another chronic condition.
Nociplastic pain
Pain linked with altered pain processing when tissue damage or a specific nerve lesion does not fully explain the symptoms.
Nociceptive pain
Pain mainly produced by actual or threatened tissue injury or inflammation.
Neuropathic pain
Pain caused by a lesion or disease affecting the nervous system's sensory pathways.
Central sensitisation
Increased responsiveness within pain-processing pathways in the brain and spinal cord. It is one proposed contributor to fibromyalgia.
Allodynia
Pain caused by a stimulus that would not normally be painful, such as light pressure or gentle touch.
Hyperalgesia
A stronger pain response than would usually be expected from a painful stimulus.
Widespread pain
Pain affecting several regions of the body rather than remaining limited to one local area.
Fibro fog
An informal term for concentration, memory, word-finding and thinking difficulties associated with fibromyalgia.
Unrefreshing sleep
Sleep after which you wake feeling that you have not rested or recovered adequately.
Widespread Pain Index
A clinical checklist recording how many of 19 body areas have been affected by pain.
Symptom Severity Scale
A scale recording the severity of fatigue, unrefreshing sleep and cognitive symptoms together with selected associated symptoms.
Tender point
A site that feels painful when pressed. A fixed tender-point count was used historically but is no longer required for diagnosis.
Synovitis
Inflammation of a joint lining that can cause objective soft swelling, warmth, pain and restricted movement.
Inflammatory marker
A blood measurement such as CRP or ESR that can rise during inflammation but does not diagnose one specific condition alone.
Creatine kinase
A blood enzyme that can rise when muscle fibres are damaged and may be checked when muscle disease is suspected.
Polymyalgia rheumatica
An inflammatory condition in adults over 50 that typically causes marked shoulder and hip-girdle pain and prolonged stiffness.
Hypothyroidism
An underactive thyroid condition that can cause fatigue, slowed thinking, constipation, cold intolerance and muscle discomfort.
Post-exertional malaise
A delayed and prolonged worsening of symptoms after activity, which is a key feature of ME/CFS rather than ordinary exercise soreness.
Pacing
Balancing activity and recovery to reduce repeated cycles of overactivity followed by prolonged symptom worsening.
Cognitive behavioural therapy
A structured therapy that can help you manage links between symptoms, thoughts, emotions and behaviour without implying that pain is imagined.
Acceptance and commitment therapy
A therapy supporting flexible responses to difficult symptoms while helping you pursue activities connected with personal values.
Amitriptyline
A tricyclic antidepressant sometimes used at low doses to support pain or sleep, with potential anticholinergic and sedating effects.
Duloxetine
An antidepressant affecting serotonin and noradrenaline that may modestly improve pain, mood or function in some people.
Pregabalin
A gabapentinoid medicine with modest fibromyalgia evidence internationally, but which NICE advises not initiating routinely for chronic primary pain.
Gabapentinoid
A medicine class including pregabalin and gabapentin, associated with dizziness, sedation, dependence, withdrawal and breathing risks.
Opioid-induced hyperalgesia
A possible increase in pain sensitivity associated with prolonged or high-dose opioid exposure.
Diagnostic overshadowing
The error of assuming that every new symptom is caused by an existing diagnosis and failing to consider another illness.
Multidisciplinary care
Coordinated support involving professionals from different disciplines according to your symptoms, function and goals.

Quick recap

  • Fibromyalgia is a real chronic condition involving widespread pain, fatigue, unrefreshing sleep and cognitive symptoms.
  • It is not caused primarily by inflammation or progressive damage within joints and muscles.
  • Fibromyalgia pain is commonly described as nociplastic because altered nervous system processing contributes to the symptoms.
  • Central sensitisation is one useful explanatory model, but the exact biology is complex and remains under investigation.
  • Normal routine blood tests and scans do not make fibromyalgia pain imaginary.
  • Pain must be generalised and symptoms must usually have persisted for at least three months.
  • Fatigue, unrefreshing sleep and fibro fog can be as disabling as pain.
  • Irritable bowel syndrome, migraine, temporomandibular pain and other chronic pain conditions commonly overlap.
  • Some people meet criteria for both fibromyalgia and ME/CFS, but post exertional malaise requires ME/CFS specific activity guidance.
  • Fixed increment graded exercise therapy should not be offered when ME/CFS is present.
  • Current diagnostic criteria use the Widespread Pain Index and Symptom Severity Scale rather than a required tender point count.
  • Fibromyalgia is not a diagnosis of exclusion and does not require every conceivable test before diagnosis.
  • Limited screening tests can identify anaemia, inflammation, thyroid disease, muscle disease and other plausible alternatives.
  • Additional tests should follow specific clinical findings rather than being repeated routinely.
  • Fibromyalgia can coexist with inflammatory arthritis, hypothyroidism, sleep apnoea and other conditions.
  • Objective joint swelling, focal neurological loss, true weakness, weight loss, night sweats and raised inflammatory markers require separate assessment.
  • Education and validation help replace fear and repeated investigations with a constructive management plan.
  • Exercise should begin at a tolerable baseline and progress flexibly according to individual response.
  • Pacing aims to reduce repeated cycles of overactivity and prolonged recovery without promoting permanent inactivity.
  • CBT and ACT can improve coping and function without implying that pain is psychological or imagined.
  • Amitriptyline and duloxetine may provide modest symptom benefit for selected adults.
  • NICE advises against routinely initiating pregabalin, gabapentin or opioids for chronic primary pain.
  • Medicines associated with dependence or withdrawal should never be stopped abruptly without a supported plan.
  • Multidisciplinary care can address movement, work, sleep, mood, medicine burden and participation.
  • Fibromyalgia often fluctuates, but many people can improve function and quality of life even without a complete cure.
  • New symptoms must still be assessed normally to avoid diagnostic overshadowing.