Anxiety

Reviewed by Dr C. J. Odike, MRCGP

Anxiety does not automatically mean that you have an anxiety disorder. Clinicians consider the trigger, duration, physical symptoms, avoidance and effect on daily life before deciding what the pattern may represent.

Anxiety is a feeling of worry, unease, fear or apprehension. It can affect your thoughts, emotions, behaviour and body. Anxiety is a symptom and a human response, not a diagnosis by itself. Feeling anxious can be useful when you face uncertainty or possible danger. It may make you more alert and prepare you to respond. Anxiety usually settles when the situation passes or becomes more manageable. Anxiety becomes more concerning when it is persistent, difficult to control or out of proportion to the situation. It may interfere with sleep, work, education, relationships, travel or everyday activities. The pattern and impact matter more than one anxious moment. How anxiety can affect your thoughts You may repeatedly imagine that something will go wrong. You may find uncertainty difficult, seek frequent reassurance or struggle to concentrate on anything except the worry. Some people recognise that their worries seem excessive but still find them difficult to stop. Others experience a strong sense of threat without knowing exactly what they fear. Anxiety can also make ordinary sensations feel more noticeable. For example, noticing your heartbeat may increase worry, which may make your heartbeat feel stronger. This does not mean that every physical symptom is caused by anxiety. How anxiety can affect your body Your body has systems that help you respond to possible danger. This is sometimes called the fight or flight response. Your heart may beat faster, your breathing may change and your muscles may become tense. You may experience palpitations, sweating, trembling, dizziness, nausea, stomach discomfort or headaches. You may feel short of breath, restless or unusually tired. Sleep and concentration may also become disrupted. These symptoms are real, even when anxiety contributes to them. However, they are not specific to anxiety. Heart, lung, hormonal, neurological and other medical conditions can produce similar symptoms. New, severe or unexplained physical symptoms should not automatically be labelled as anxiety. Their timing, context, associated features and your past health problems determine whether physical assessment is needed. Anxiety can change your behaviour You may avoid places, people, tasks or sensations that make you anxious. Avoidance can provide short term relief. However, repeated avoidance may strengthen the belief that the situation is unsafe or impossible to manage. You may also seek repeated reassurance, check things frequently or rely on alcohol, drugs or another behaviour to reduce discomfort. These responses can maintain anxiety or create additional health problems. Gradual, planned exposure can help with some anxiety problems. This means approaching feared situations in manageable steps rather than avoiding them completely. It is often used within evidence based self help or psychological therapy. The aim is not to force yourself into overwhelming or unsafe situations. Anxiety is not one single condition Anxiety may occur during stress, illness, pain, bereavement or major life changes. It can accompany depression, trauma related conditions, obsessive compulsive disorder and several other mental health problems. Different anxiety disorders have different patterns. Generalised anxiety disorder involves difficult to control worry about several areas of life. The anxiety is present much of the time and affects daily functioning. For a diagnosis of generalised anxiety disorder, the pattern usually continues for at least six months. Other patterns include anxiety linked to social situations, a specific object or situation, separation, health concerns or sudden episodes of intense fear. One person can experience more than one pattern. A panic attack is a sudden episode of intense fear with physical and emotional symptoms. Having one panic attack does not automatically mean that you have panic disorder. Panic attacks are explored separately in the lesson "Panic Attacks". Anxiety and stress can overlap Stress often develops in response to identifiable demands, such as work pressure, illness, financial difficulty or relationship problems. Anxiety may continue after the immediate pressure settles or may focus on events that have not happened. The distinction is not always clear. Stress can cause anxiety, and anxiety can make stressful situations harder to manage. A clinician focuses on the pattern and impact rather than insisting on one label immediately. Physical health and substances can contribute An overactive thyroid, low blood sugar, heart rhythm problems and some respiratory conditions can produce anxiety like symptoms. Pain, hormonal changes and other illnesses may also contribute. Caffeine, nicotine, alcohol, recreational drugs and some prescribed medicines can worsen anxiety. Withdrawal from alcohol, sedative medicines or certain drugs can also cause marked anxiety and physical symptoms. You should not stop prescribed medication suddenly without clinical advice. This does not mean that everyone with anxiety needs extensive testing. A clinician uses your symptoms, background and examination to decide whether targeted investigations are appropriate. There is no blood test or scan that confirms an anxiety disorder. How anxiety is assessed Assessment usually begins with a conversation about your worries, triggers and physical symptoms. The clinician asks how often they occur, how long they last and how much they interfere with your life. They may ask what you avoid, whether you experience sudden attacks of fear and whether you use reassurance or checking to manage anxiety. They also ask about sleep, low mood, trauma, alcohol, drugs, prescribed medicines and physical health. A clinician should ask about thoughts of self harm or suicide when assessing significant anxiety. Anxiety can coexist with depression or a mental health crisis. Asking directly helps identify whether urgent support is needed. A mental state examination is the clinician's structured assessment of your behaviour, speech, mood, thoughts, awareness and engagement. It is not a test that you pass or fail. Short questionnaires may help identify possible anxiety and measure change over time. A questionnaire score cannot diagnose the cause or replace a comprehensive assessment. When to seek help Arrange an assessment if anxiety is difficult to control, persists, causes significant distress or affects everyday life. Seek help if you are avoiding important activities, relying on alcohol or drugs, or repeatedly seeking medical reassurance without lasting relief. You can seek help before symptoms become severe. A GP can assess possible mental and physical contributors and discuss appropriate support. Adults in England can also usually refer themselves to NHS Talking Therapies for anxiety and depression. Treatment depends on the anxiety pattern, its impact and your preferences. Options may include education, guided self help, cognitive behavioural therapy, applied relaxation or medication. Treatment should be selected through clinical assessment and shared decision making. Cognitive behavioural therapy explores how thoughts, physical sensations and behaviour influence each other. It may include gradually approaching feared situations and reducing behaviours that maintain anxiety. Some antidepressant medicines can treat anxiety disorders. A medicine called an antidepressant may be offered even when you are not depressed. Medication is not automatic and requires discussion of likely benefits, adverse effects, interactions and withdrawal symptoms. Supportive measures may include regular meals, physical activity, a consistent sleep routine and reducing excessive caffeine. Talking with someone you trust may also help. These measures do not replace assessment when anxiety is persistent, disabling or associated with safety concerns. Urgent mental health support Call 999 or go to A&E if your life or someone else's life is at risk, you have seriously harmed yourself, you have taken an overdose, or you cannot keep yourself or someone else safe. For urgent mental health help when there is no immediate danger, request an urgent GP appointment or contact NHS 111 and select the mental health option. Samaritans provides confidential listening support on 116 123. Anxiety may overlap with symptoms discussed in "Palpitations", "Feeling Short of Breath", "Dizziness and Vertigo", "Persistent Tiredness and Fatigue" and "Chest Pain: What Could It Be?", but these symptoms should not automatically be attributed to anxiety.

Anxiety is interpreted as a pattern rather than diagnosed from one feeling or physical symptom. Clinicians combine triggers, duration, controllability, avoidance, functional impact, physical health, substance use and immediate safety before deciding whether an anxiety disorder or another explanation is most likely.

Medical words made simple

Anxiety
A feeling of worry, unease, fear or apprehension that can affect your thoughts, body and behaviour.
Anxiety disorder
A condition where anxiety is persistent or recurring and causes significant distress or interferes with everyday life.
Generalised anxiety disorder
A condition involving difficult-to-control worry about several areas of life, usually present much of the time for at least six months.
Fight-or-flight response
The body's response to possible danger, which can increase alertness, heart rate, breathing and muscle tension.
Avoidance
Staying away from situations, activities or sensations because you expect them to cause anxiety or harm.
Palpitations
An increased awareness of your heartbeat. It may feel fast, pounding, fluttering or irregular and has several possible causes.
Cognitive behavioural therapy
A structured psychological treatment that explores links between thoughts, emotions, physical sensations and behaviour.
Mental state examination
A clinician's structured assessment of your behaviour, speech, mood, thoughts, awareness and ability to engage.

Quick recap

  • Anxiety is a human response and does not automatically mean an anxiety disorder.
  • Persistent, difficult to control anxiety may affect sleep, concentration and daily functioning.
  • Avoidance can reduce anxiety briefly while maintaining it over time.
  • Physical illness, medicines, caffeine, alcohol and drugs can produce anxiety like symptoms.
  • Questionnaires support assessment but do not establish the diagnosis alone.
  • Immediate danger, serious self harm or overdose requires 999 or A&E.