Health anxiety: symptoms, causes and treatment

Key points

• Health anxiety is a persistent fear of serious illness that continues after tests come back clear [1].
• Hypochondria is the older name. ICD-11, the World Health Organization’s current classification, calls it hypochondriasis and groups it with obsessive-compulsive and related disorders [3][4].
• Two behaviours keep it going: checking, including online symptom searching, and reassurance seeking, including repeat GP visits [1].
• Reassurance relieves anxiety briefly, then the relief fades and the urge to ask returns stronger [10].
• CBT adapted for health anxiety has the strongest evidence [9]. NICE has no guideline dedicated to it, so UK treatment rests on trial evidence [2].

What health anxiety is

Health anxiety is a persistent fear of having or developing a serious illness, which carries on despite normal test results and medical reassurance. The older word for it is hypochondria. In ICD-11, the World Health Organization’s current classification, it is called hypochondriasis, or health anxiety disorder [3].

If you need help now. Samaritans: call 116 123, free, 24/7. Shout: text SHOUT to 85258. NHS 111, then choose the mental health option. Call 999 if anyone is in immediate danger.

ICD-11 groups hypochondriasis with obsessive-compulsive disorder, a change from ICD-10, where it sat with the somatoform disorders [3][4]. DSM-5, the American manual, split the old category in two: illness anxiety disorder, for people with few physical symptoms, and somatic symptom disorder, for people with troubling ones [5]. UK records usually say health anxiety [1].

No reliable UK population figure exists. Screening in four outpatient clinics at a single English hospital found 19.9% of patients above the threshold in 2008 to 2010, up from 14.9% in 2006 to 2008 [7].

Symptoms

Health anxiety appears as thoughts, behaviours and sensations that feed each other.

Thoughts and feelings

• Persistent worry about having or catching a serious illness [1]
• Reading ordinary sensations, such as a headache, as signs of disease [1]
• Fear that doctors have missed something [1]

Checking

• Examining the body for lumps, marks, mole changes or swelling [1]
• Taking a pulse or temperature repeatedly
• Searching symptoms online, sometimes for hours [1]

Reassurance seeking

• Repeat GP appointments and requests for further tests [1]
• Asking family to confirm nothing is wrong, often in the same words
• Repeat calls to NHS 111 or online symptom checkers

Physical sensations. Anxiety produces a fast heartbeat, chest tightness, dizziness, stomach upset and headaches [1]. These are real bodily events, read as evidence of disease, which raises anxiety further.

Why reassurance relieves anxiety and then makes it worse. Anxiety drops soon after a clear answer, then the relief fades and the question returns [10]. Each round teaches the brain that asking kept the feared outcome away, so the behaviour is reinforced and the gaps between checks shorten [10]. Nothing tests what would have happened without it, so the belief holds [10].

Commonly confused with. Generalised anxiety disorder, where worry covers many topics, obsessive-compulsive disorder, where checking follows intrusive thoughts, and somatic symptom disorder, where physical symptoms dominate [5].

Types

Health anxiety has no formal subtypes in ICD-11, but two presentations are recognised, and DSM-5 records them as specifiers [5].

• Care-seeking presentation. Medical care is used heavily: frequent GP appointments, requests for scans and tests, and second opinions [5].
• Care-avoidant presentation. Medical care is rarely used or actively avoided [5]. Appointments are cancelled and new symptoms left unreported, because a result could confirm the fear. It is easy to miss, and real illness may go unexamined.

Causes and risk factors

No single cause has been identified. Health anxiety is understood as developing from past experience, learned beliefs about illness and how body signals are interpreted [10]. Factors linked with it include:

• Serious illness in childhood, or serious illness or death in the family [5]
• A frightening medical experience, such as a delayed or missed diagnosis
• A general tendency to high anxiety, or another anxiety-related condition [5]
• Bereavement or heavy stress shortly before onset
• Heavy internet use to interpret symptoms. Clinic prevalence rose over four years, with growing online self-diagnosis named as a likely contributor, though cause was not proven [7]

Health anxiety is not attention seeking, and not inventing symptoms. The sensations noticed are usually genuine bodily events read as dangerous [1].

How it is diagnosed

In the UK a GP is the usual starting point, and can recognise health anxiety, investigate physical causes and refer on [1]. A diagnosis is normally recorded by a psychiatrist registered with the GMC, a clinical psychologist registered with the HCPC, or another qualified mental health professional.

Assessment is a structured conversation about what is feared, how long it has gone on, what checking and reassurance seeking look like in a typical week, and what has already been investigated. Questionnaires such as the Health Anxiety Inventory measure severity [6].

People in England can refer themselves to NHS Talking Therapies without a GP [1]. It took 1.81 million referrals in 2024-25, and of referrals completing a course of treatment, 91.6% waited less than six weeks, a figure covering anxiety and depression as a whole [8].

A diagnosis names a recognised pattern and opens access to treatment. It does not mean symptoms were imagined, or that new ones should go unreported.

Treatment

CBT adapted for health anxiety has the strongest evidence and is the usual first offer in the UK [1][9]. NICE has published no guideline dedicated to it, and its quality standard on anxiety disorders does not list health anxiety among the conditions it covers [2].

CBT for health anxiety usually involves:

• Mapping the cycle from sensation, to interpretation, to checking, to short relief
• Testing feared interpretations against other explanations
• Cutting down checking and searching and sitting with the urge instead, close to exposure and response prevention
• Agreeing with family, and sometimes the GP, to stop giving repeated reassurance

A review of 14 trials found a large effect for CBT against control conditions at the end of therapy, d = 1.01, 95% confidence interval 0.77 to 1.25 [9]. The CHAMP trial, with 444 patients in five English general hospitals, gave four to ten one-hour sessions and found more improvement than standard care, still present at five years [6].

Antidepressants, mainly SSRIs, are described as a second-line option after psychological therapy [5]. Trials specific to health anxiety are few and small, so confidence in any effect is lower than for CBT. Decisions about medicine are for a GP or prescriber.

Living with health anxiety

Management centres on reducing the behaviours that keep the cycle running.

• Record every check and reassurance request for a week, then cut the frequency in steps [1]
• Write the anxious thought down and put a balanced alternative next to it [1]
• When the urge to check arrives, do something else and watch whether it fades [1]
• Agree one calm, repeated answer with family for reassurance requests, and remove bookmarked health sites and tracking apps

You do not have to tell an employer or university your diagnosis. Occupational health or a student support service can arrange adjustments without your manager or tutor being given clinical detail. Lower-cost counselling is available from charities including Mind and Anxiety UK [1], and any private therapist should be registered with HCPC, BPS, BACP, UKCP or GMC.

When to speak to a professional

Speak to a GP, or self-refer to NHS Talking Therapies in England, if:

• Worry about your health has lasted weeks and fills much of most days
• Checking or symptom searching is affecting work, sleep or relationships
• Repeated tests have come back normal and the relief no longer lasts
• You are avoiding appointments or screening invitations because of what might be found
• You have stopped working or seeing people because of illness fears

Contact your GP the same day, or call NHS 111 and choose the mental health option, if you cannot manage daily tasks. If you are having thoughts of ending your life, or cannot keep yourself safe, call Samaritans on 116 123, text SHOUT to 85258, or call 999 if anyone is in immediate danger.

New or changing physical symptoms should still be reported to a GP. Health anxiety does not protect anyone from physical illness.

Common questions

Is health anxiety the same as hypochondria?

Broadly, yes. Hypochondria is the older, everyday word, and ICD-11 uses hypochondriasis, also written as health anxiety disorder [3]. UK clinicians prefer health anxiety, because hypochondria is often used dismissively.

Why does reassurance from a doctor stop working?

Reassurance lowers anxiety quickly, then the relief fades and the question comes back [10]. Each round teaches that asking kept the danger away, so the urge grows stronger [10].

Can health anxiety cause real physical symptoms?

Yes. Anxiety produces a fast heartbeat, chest tightness, muscle tension, dizziness and stomach problems [1]. Those sensations are genuine, and are read as signs of disease, which generates more of them.

Clinical review pending

References

1. NHS. Health anxiety. NHS, 2026. https://www.nhs.uk/mental-health/conditions/health-anxiety/
2. National Institute for Health and Care Excellence. Anxiety disorders. Quality standard QS53, 2014. https://www.nice.org.uk/guidance/qs53
3. World Health Organization. Clinical descriptions and diagnostic requirements for ICD-11 mental, behavioural and neurodevelopmental disorders. WHO, 2024. https://www.drugsandalcohol.ie/41519/1/WHO_Clinical_descriptions_and_diagnostic_requirements_ICD-11.pdf
4. Kogan CS, Stein DJ, Rebello TJ, Keeley JW, Chan KJ, Fineberg NA, et al. Accuracy of diagnostic judgments using ICD-11 vs. ICD-10 diagnostic guidelines for obsessive-compulsive and related disorders. Journal of Affective Disorders, 2020. https://uhra.herts.ac.uk/id/eprint/8375/2/Kogan_JAD_2020.pdf
5. Illness Anxiety Disorder. StatPearls, NCBI Bookshelf. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK554399/
6. Cognitive-behaviour therapy for health anxiety in medical patients (CHAMP): a randomised controlled trial with outcomes to 5 years. NIHR Programme Grants for Applied Research, NCBI Bookshelf, 2017. https://www.ncbi.nlm.nih.gov/books/NBK453130/
7. Tyrer P, Cooper S, Tyrer H, Wang D, Bassett P. Increase in the prevalence of health anxiety in medical clinics: possible cyberchondria. International Journal of Social Psychiatry, 2019. https://journals.sagepub.com/doi/abs/10.1177/0020764019866231
8. NHS England Digital. NHS Talking Therapies, for anxiety and depression, Annual reports, 2024-25. NHS England, 2025. https://digital.nhs.uk/data-and-information/publications/statistical/nhs-talking-therapies-for-anxiety-and-depression-annual-reports/2024-25
9. Cooper K, Gregory JD, Walker I, Lambe S, Salkovskis PM. Cognitive behaviour therapy for health anxiety: a systematic review and meta-analysis. Behavioural and Cognitive Psychotherapy, 45(2), 2017. https://www.cambridge.org/core/journals/behavioural-and-cognitive-psychotherapy/article/abs/cognitive-behaviour-therapy-for-health-anxiety-a-systematic-review-and-metaanalysis/1D47C1A6EFE00BEB70A9CEF97D7F58BA
10. Osborne DWS, Williams CJ. Excessive reassurance-seeking. Advances in Psychiatric Treatment, 19(6), 2013. https://www.cambridge.org/core/journals/advances-in-psychiatric-treatment/article/excessive-reassuranceseeking/9B5208DB11EA7907CB95D93727DC86DF