Health anxiety is one of the most exhausting forms of anxiety we see in clinical practice. It can look rational on the surface, after all, caring about your health is sensible. But for some people, concern quietly shifts into hypervigilance, repeated checking, reassurance seeking, and hours lost to Google searches.
The paradox? The very behaviours meant to create certainty actually keep anxiety alive. Let’s unpack how.
What Is Health Anxiety?
Health anxiety (sometimes referred to as illness anxiety disorder) involves persistent worry about having or developing a serious illness, despite medical reassurance or lack of evidence.
It exists on a spectrum. At one end, we all notice symptoms and seek medical advice when appropriate. At the other end, the nervous system becomes locked in threat detection mode. Scanning, interpreting, and misinterpreting normal bodily sensations as dangerous.
A small headache becomes a brain tumour.
A muscle twitch becomes neurological disease.
Fatigue becomes something catastrophic.
The issue isn’t the symptom. It’s the interpretation.
The Checking Cycle: How It Gets Maintained
Health anxiety is maintained by a predictable loop.
Trigger
A body sensation (tight chest, headache, mole change), a news article, someone else’s diagnosis, or even just a random thought: “What if this is something serious?”
Catastrophic Interpretation
The mind jumps to worst-case conclusions: “This could be cancer.” “What if doctors missed something?”
Anxiety Spike
The nervous system activates. Heart rate increases. Attention narrows. The body now feels different, which becomes more “evidence.”
Checking & Reassurance
This can include:
Repeated body checking (feeling lymph nodes, checking pupils, examining skin)
Googling symptoms
Comparing both sides of the body
Monitoring heart rate via smartwatch
Asking partners/friends: “Does this look normal?”
Booking repeated GP or specialist appointments
Requesting repeat tests
In Australia, many clients cycle repeatedly through visits to a GP (General Practitioner) for reassurance, which is entirely understandable, but often unintentionally reinforces the loop.
Temporary Relief
Reassurance works, briefly. Anxiety drops.
Doubt Returns
Then the mind says: “But what if they missed something?”, “What if it’s in its early stages?”, “Should I check one more time?” And the cycle restarts.
Why Checking Makes Anxiety Worse
Checking feels responsible. Vigilant. Protective. But neurologically, checking teaches your brain one powerful lesson: “This threat must be important, we keep responding to it.” Each time you check and feel relief, your brain links checking with safety. That relief acts as reinforcement. Over time, the urge to check becomes stronger and more frequent.
Even worse, excessive checking increases sensory sensitivity. The more you scan your body, the more sensations you notice, many of which are completely normal physiological fluctuations. When attention amplifies sensation, sensation amplifies anxiety.
The Role of Intolerance of Uncertainty
At its core, health anxiety is not about illness.It’s about uncertainty. No doctor can give 100% certainty. No scan can guarantee future health. The anxious brain struggles deeply with the phrase: “It’s very unlikely.” For someone with health anxiety, “very unlikely” feels like “still possible.” And “possible” feels intolerable.
The Google Trap
Online searching deserves its own section. Algorithms are not calibrated to soothe anxiety. They are calibrated for engagement. Rare and dramatic illnesses are overrepresented. Reading about serious conditions increases availability bias, making them feel more common than they are. The anxious brain doesn’t search for balance. It searches for certainty. And the internet cannot provide it.
What Actually Helps?
As a psychologist, treatment is less about proving someone is healthy and more about changing the relationship to uncertainty and checking behaviours.
Mapping Your Personal Cycle
Awareness reduces automaticity. Notice:
What triggers you?
What do you do next?
How long does relief last?
Reducing Checking Gradually
Not all at once. But strategically. For example:
Delay Googling by 30 minutes.
Reduce body checking from 10 times daily to 5.
Book one GP you trust and agree on a structured review plan rather than ad hoc appointments.
Learning to Sit With “Maybe”
This is the hardest skill. Instead of: “I need to know this isn’t serious.” We practise: “Maybe it’s something serious. Maybe it’s not. I’m choosing not to solve that right now.” This is not dismissal. It’s nervous system retraining.
Refocusing on Valued Living
Health anxiety shrinks life. People avoid travel, exercise, certain foods, even joy, “just in case.” Recovery involves gently re-expanding life despite uncertainty.
When to Seek Professional Support
If you notice:
Frequent medical appointments without lasting reassurance
Hours lost to checking or Googling
Avoidance of activities due to fear of illness
Significant distress impacting work or relationships
Working with a psychologist trained in anxiety or OCD presentations can be highly effective. Cognitive Behavioural Therapy (CBT) and exposure-based approaches are particularly helpful.
A Final Reframe
The goal is not to eliminate all health-related thoughts. The goal is to stop organising your life around them. Health anxiety convinces you that more checking equals more safety. But real safety comes from flexibility: Being able to notice a sensation. Choosing not to spiral. Living your life anyway. Because the ultimate certainty we seek: total guarantee of health, simply doesn’t exist for any human being. Learning to live well without it is the real work.