When concern about health becomes the main problem
Clinicians will recognise health anxiety in its many guises: the patient who monitors bodily sensations closely, who seeks repeated reassurance from GPs or online searches, or who avoids healthcare altogether for fear of what might be found. Health anxiety sits at an awkward intersection as it isn’t simply anxiety nor is it a physical health presentation, but instead a rigid and often exhausting relationship with uncertainty about one’s own body. It frequently co-occurs with, or follows, a genuine health scare or diagnosis, which can make it harder for clients to accept that anxiety, not the body, has become the primary problem.
ACT offers a distinct angle on this problem. Rather than disputing the client’s physical concerns, it addresses the struggle to eliminate uncertainty that keeps the anxiety cycle turning.
Why ACT fits the specific mechanics of health anxiety
Health anxiety is maintained less by any single symptom and more by what clients do in response to bodily sensations: checking, researching, seeking reassurance, avoiding. Each behaviour brings short-term relief from anxiety, and each one reinforces the belief that uncertainty about health must be resolved before life can continue. ACT is well-placed here precisely because it doesn’t attempt to eliminate uncertainty, which is difficult, if not impossible, to do. Instead, it targets the struggle against it.
Rather than reassuring clients that they are healthy, ACT works by helping clients notice fusion with thoughts demanding certainty (“I need to know for sure this isn’t something serious“) and loosen the grip those thoughts have on behaviour. Willingness to sit with uncertainty is the central move, and it maps closely onto what actually maintains the disorder. This distinction often lands well with clients who have already exhausted reassurance-seeking as a strategy and found it doesn’t provide lasting relief.
Reconnecting clients with what they want their life to involve, independent of symptom status, gives this work direction. Lives that have narrowed around monitoring and avoidance (cancelled plans, withdrawn relationships, healthcare avoidance etc) often need a positive pull toward something, not just relief from checking.
Health anxiety and ACT – A clinical illustration
A client with a history of health anxiety following a relative’s cancer diagnosis checks their body for lumps multiple times daily and researches symptoms online for hours at a time. This has led to significant distress and reduced work performance. Reassurance from their GP works, but only briefly: anxiety returns within hours and the checking resumes, each cycle strengthening the belief that certainty is both necessary and achievable if they just check enough or ask enough.
An ACT-informed approach doesn’t add another round of reassurance. Instead, it might help the client notice fusion with the thought “if I don’t check, I’ll miss something serious,” and treat it as a thought rather than a fact to act on. Alongside this, the client practises willingness to experience the discomfort of not checking rather than trying to eliminate it, guided by a value such as being fully present with their children rather than preoccupied with their body. Checking behaviour becomes something to evaluate on workability (“does this get me closer to the life I want”) rather than on whether it resolves uncertainty.
The evidence for using ACT for clients with health anxiety
ACT has a growing evidence base for health anxiety, with trials and reviews suggesting it can be effective in reducing health-related worry and associated impairment, often delivered alongside or in comparison with CBT approaches specifically adapted for health anxiety. This remains a smaller and less established literature than for CBT, and is currently a promising, developing evidence base rather than an equivalent alternative.
Notes for clinicians
It’s important to rule out or appropriately manage any underlying medical condition before formulating a presentation as health anxiety, and to work collaboratively with GPs or relevant medical teams throughout. Formulation should not treat every somatic complaint as a target for psychological work; it should remain attentive to genuine medical risk alongside the psychological pattern and revisited as new symptoms or information emerge.
Next steps
If you are looking to build confidence in applying ACT to health anxiety, we have plenty of upcoming and on-demand training courses that cover ACT and anxiety-related presentations.
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