Health anxiety, clinically called illness anxiety disorder (formerly known as hypochondriasis), is intense, persistent worry about having a serious illness despite medical reassurance.
The clinical name changed partly because the old label carried dismissive, pejorative connotations that don’t reflect how genuinely distressing this actually is. It’s a real anxiety response to real bodily sensations, not imagined symptoms or attention seeking.
Checking a locked door repeatedly might feel reassuring in the moment, but it doesn’t change whether the door is actually locked, and doing it again five minutes later doesn’t make the anxious feeling go away for good.
Why Reassurance Doesn’t Stick
Health anxiety tends to run on a cycle: body checking, symptom searching, asking for reassurance, brief relief, and then the worry returns. Each round of reassurance provides only short term relief, which is part of what keeps the cycle going rather than resolving it.
Health Anxiety in Therapy
Therapy, especially CBT, can help someone work with this cycle directly rather than chasing more reassurance that only offers temporary relief.
This entry is for general education, to make health anxiety easier to understand. It isn’t a diagnosis, and reading about it here doesn’t mean it applies to you. It isn’t a replacement for professional evaluation, and it can’t speak to your specific situation.

