How Pain Is Measured and Managed

Clinicians assess pain intensity alongside function, sleep, associated symptoms and personal goals. Treatment may include condition specific physical, psychological, medical or procedural approaches, with planned review for benefit and harm.

Pain measurement begins with the person's report Pain is a personal sensory and emotional experience. No blood test, scan or monitor can directly measure how much pain someone feels. Self report is therefore the main source of information when a person can communicate. The clinician should believe the report while also assessing the possible cause and urgency. A pain score does not prove tissue damage, identify a diagnosis or show whether a condition is dangerous. A low score cannot exclude serious illness. Scales describe one part of the experience A numerical rating scale usually asks for a number from zero to ten. Zero means no pain, while ten represents the person's worst imaginable pain. A verbal rating scale uses words such as mild, moderate or severe. A faces pain scale can help some children describe pain intensity. These scales translate an experience into a consistent format. They are not objective units like blood pressure or temperature. Repeated use of the same suitable scale can help track change for one person. Scores should be interpreted with the circumstances and should not be compared as exact units between people. Communication needs can change the assessment Some people cannot use a numerical scale reliably. Age, language, cognitive impairment, learning disability, distress and communication differences can affect which tool is suitable. Clinicians can use simpler words, pictures, interpreters or familiar communication methods. They should still seek self report whenever possible. An observational pain tool records behaviours such as facial expression, movement or vocalisation when self report is not possible. Behaviour provides evidence but does not measure pain directly. Family members or carers may identify changes from the person's usual behaviour. Their observations support assessment without replacing examination or clinical judgement. Pain intensity is only one domain Clinicians ask where pain is felt, how it started and whether it is constant or intermittent. They ask about pain quality, movement, sleep and associated symptoms. Functional impact means how pain affects walking, self care, work, relationships and daily activity. Distress, mood and confidence can also shape priorities. A pain body map can record location and spread. Condition specific questionnaires may assess disability, neuropathic features or the effect on quality of life. The most useful outcome depends on the person's goal. Improved sleep or walking may matter even when the numerical score changes little. Management does not follow one universal ladder The World Health Organization developed its historic analgesic ladder for cancer pain. It should not be taught as a universal sequence for every acute or chronic pain condition. An analgesic is a medicine used to reduce pain. The appropriate analgesic depends on the diagnosis, likely mechanism, severity, duration and individual risks. Clinicians also consider whether urgent treatment of the cause is needed. Pain relief should not delay assessment of dangerous conditions. Non medicine treatments are condition specific Education, movement, therapeutic exercise, physiotherapy, occupational therapy and practical adaptations can help selected pain conditions. Rest, heat, ice or massage are not universal first steps. Psychological approaches can reduce distress and improve function for some people. Their use does not mean that pain is imagined or purely psychological. Procedures, injections or surgery are appropriate only for selected diagnoses. A treatment that helps one pain condition may be ineffective or harmful in another. Common pain medicines have different roles Paracetamol can help some short term pain conditions. Evidence is limited for others, and NICE advises against starting it for chronic primary pain. Paracetamol is present in many combined cold, flu and pain products. Taking more than the recommended amount can cause serious liver injury. A non steroidal anti inflammatory drug, usually shortened to NSAID, can reduce pain and inflammation in selected conditions. Examples include ibuprofen and naproxen. NSAIDs can cause stomach bleeding, kidney injury and cardiovascular problems. Pregnancy, asthma, other medicines and previous ulcers can change their safety. Topical and oral NSAIDs have different exposure and risk profiles. Clinicians use the lowest effective dose for the shortest suitable time when an NSAID is appropriate. Opioids require a specific indication and plan An opioid can be appropriate for selected severe acute pain, postoperative pain, cancer pain or palliative care. This does not make opioids the final step for every pain problem. Opioids are not recommended for chronic primary pain or chronic low back pain. Their long term benefit for many non cancer pain conditions is limited. Possible harms include constipation, nausea, drowsiness, falls, impaired driving and dangerously slowed breathing. Tolerance, physical dependence, withdrawal and addiction are distinct risks. Before starting an opioid, the clinician discusses alternatives, expected benefit, review timing and a stopping plan. Regular opioids should not be stopped suddenly without professional advice. Neuropathic pain follows a different pathway Neuropathic pain is caused by a lesion or disease of the somatosensory nervous system. Burning or shooting pain can provide a clue but does not confirm it. NICE offers several initial medicine options for most adult neuropathic pain. These include amitriptyline, duloxetine, gabapentin or pregabalin, except for trigeminal neuralgia. These medicines have different side effects and can cause withdrawal problems. The diagnosis, other conditions and treatment response guide selection and review. Failure of paracetamol or an NSAID does not prove neuropathic pain. It should prompt reassessment of the diagnosis, mechanism, dosing, adherence and treatment goal. Chronic primary pain has its own recommendations NICE supports supervised exercise, selected psychological therapy and some other approaches for chronic primary pain. An antidepressant can sometimes be considered after discussing benefits and harms. NICE advises against initiating paracetamol, NSAIDs, opioids or gabapentinoids for chronic primary pain. Guidance differs when an adequately explanatory underlying condition is present. Chronic primary and secondary pain can coexist. Clinicians use shared decision making to combine the relevant guidance. Treatment should be reviewed as a planned trial Shared decision making means the clinician and person discuss options, uncertainty, benefits, harms and preferences together. A treatment plan should state what improvement is expected and when review will occur. It should also state which adverse effects require action. Review considers pain, function, sleep, quality of life and side effects. Continuing a treatment solely because it is stronger or familiar is not a sufficient reason. If benefit is inadequate, clinicians reconsider the cause, mechanism and plan. They may adjust, switch or stop treatment rather than automatically increasing the dose. Investigations look for causes and treatment risks Tests are selected to investigate an underlying cause, warning feature or treatment risk. They are not performed simply to create an objective pain score. Blood tests can assess kidney or liver function before or during selected medicines. Imaging or nerve tests answer specific structural or neurological questions. A normal test does not make pain unreal. An abnormal result may also be incidental and may not explain the pain fully. Specialist services have several roles A specialist pain service can help with complex assessment, rehabilitation, medicine review, procedures or a pain management programme. Referral is not limited to very high pain scores. A pain management programme combines coordinated physical and psychological components. It aims to improve function and quality of life rather than promise complete pain removal. When to get help Call 999 for pain with severe breathing difficulty, collapse, sudden confusion, possible stroke signs or persistent chest pressure. Do not drive yourself. Go to A&E or call 999 for back pain with saddle numbness, worsening weakness in both legs or new bladder or bowel dysfunction. Call 999 if someone taking an opioid has slow, shallow or difficult breathing, blue or grey lips, or cannot be woken normally. Contact NHS 111 immediately after taking more paracetamol than the packet or prescription allows, even if you feel well. Seek urgent GP or NHS 111 advice for severe pain that starts suddenly, worsens quickly or occurs with fever and feeling very unwell. Arrange review when treatment is not helping, side effects are troublesome or the pain pattern changes. Do not increase prescribed doses or stop regular dependence forming medicines without advice. This lesson explains how clinicians assess and manage pain. It cannot select a safe treatment for an individual pain problem or replace urgent medical care.

A pain score describes one part of a personal experience. Safe management matches treatment to the pain condition and individual risks, then reviews outcomes that matter to the person.