Health anxiety — sometimes called illness anxiety disorder or, historically, hypochondria — is characterised by persistent worry about having or developing a serious illness. It affects an estimated 4–6% of people and is often exacerbated by the availability of medical information online, which allows a symptom to be traced to its worst possible cause in minutes.
When information helps
For many people, accurate and contextualised information reduces anxiety. A lab result flagged 'slightly high' that comes with a clear explanation — 'this is common after exercise and is not clinically significant without other symptoms' — is far less anxiety-provoking than a raw number with an asterisk. Explanation converts uncertainty into understanding, and uncertainty is the fuel for health anxiety.
Digital health tools that provide plain-language summaries, reference ranges and context (not just numbers) can genuinely help anxious patients. Knowing exactly what a finding means, rather than imagining what it might mean, is calming for most people.
When information makes things worse
For some people, searching for information becomes a compulsive behaviour that temporarily relieves anxiety but reinforces the pattern. Each search leads to reassurance — then doubt — then another search. If you find yourself checking symptoms repeatedly, spending hours researching after a normal test result, or seeking reassurance from multiple doctors for the same concern, information-seeking may be feeding your anxiety rather than resolving it.
In these cases, structured psychological support — particularly cognitive behavioural therapy (CBT) with an exposure component — is the most evidence-based approach. CBT for health anxiety teaches different responses to bodily sensations and medical information, reducing the need for checking behaviours.
"The goal isn't to know everything — it's to tolerate not knowing everything. That skill can be learned."
Sara Nassereddin, Health Technology Writer