Health anxiety and obsessive-compulsive disorder (OCD) have a great deal in common. Both can involve intrusive thoughts, a strong sense of uncertainty and repetitive behaviours intended to prevent something bad from happening. In fact, some people experiencing health anxiety describe patterns of thinking and behaviour that look remarkably similar to those seen in OCD. So, are they actually the same condition? Let’s take a look.
What is health anxiety?
Health anxiety involves excessive worry or preoccupation with the possibility of having, or developing, a (usually) serious illness. Someone might become particularly concerned about a physical symptom, such as a headache, an unusual sensation or a change in their body. They may repeatedly check their body, search online for explanations, seek reassurance from doctors or loved ones, or avoid information and situations that trigger their fears. These behaviours can become increasingly time-consuming and difficult to resist. And although they might provide temporary relief, the underlying uncertainty often returns.
How is health anxiety similar to OCD?
The similarities become particularly apparent when we look at the processes keeping the difficulties going. In OCD, intrusive thoughts, images, feelings or doubts can trigger anxiety and a perceived need to take action. People perform compulsions to reduce distress, prevent feared consequences, or resolve uncertainty. Health anxiety can operate in much the same way. For example, someone notices an unusual physical sensation and worries it might indicate cancer. They begin researching symptoms online, checking their body and seeking reassurance. Perhaps they feel better for a few hours, but another sensation or doubt soon appears, and the process begins again. The cycle is remarkably similar to OCD. The more we check, research or seek reassurance, the more important the original concern can begin to seem. And although these behaviours might help us feel better temporarily, they can make it increasingly difficult to tolerate uncertainty about our health.
So why are they considered different conditions?
One distinction concerns the nature and focus of the person's preoccupations. Health anxiety typically revolves around fears about illness and the interpretation of bodily sensations. OCD can involve an enormous range of intrusive experiences, including contamination, harm, morality, relationships and responsibility. OCD often involves particularly repetitive, intrusive obsessions and compulsions, which may include elaborate mental rituals. However, these distinctions aren't always clear-cut. Interestingly, different diagnostic systems classify health anxiety somewhat differently. The World Health Organization's ICD-11 classification places hypochondriasis, a condition involving excessive preoccupation with serious illness, within the group of obsessive-compulsive and related disorders. The DSM-5, another widely used diagnostic system, instead recognises conditions such as illness anxiety disorder and somatic symptom disorder. So even within psychiatry and psychology, there isn't complete agreement on how to categorise these difficulties.
It's also possible for someone to experience both OCD and health anxiety. Does the distinction matter for treatment? Sometimes, particularly when deciding which therapeutic approach is most appropriate. However, these conditions overlap considerably in the psychological treatments used. Cognitive behavioural therapy (CBT) for both OCD and health anxiety often involves identifying the thoughts, beliefs and behaviours that maintain anxiety and gradually changing how we respond. This may include reducing excessive reassurance seeking, checking and avoidance, alongside developing a greater tolerance for uncertainty.
For OCD, exposure and response prevention (ERP) is a central component of treatment. For health anxiety, treatment may also focus on how we interpret bodily sensations, our beliefs about illness and the tendency to become increasingly vigilant towards perceived signs of disease. Of course, it's important to distinguish excessive health-related checking from appropriate medical care. Having health anxiety doesn't mean that genuine physical symptoms should be dismissed or medical advice avoided.
So, is health anxiety a form of OCD?
I think it's reasonable to say that health anxiety and OCD are closely related conditions, with considerable overlap in the processes that maintain them. However, they aren't necessarily the same thing. In practice, I think the most important thing is understanding the processes maintaining someone's difficulties, rather than getting overly concerned with which diagnostic label fits best. Whether we call it health anxiety, OCD or a combination of the two, effective treatment involves helping someone regain their freedom from the repetitive cycle of fear, checking and reassurance. And fortunately, both conditions can respond well to appropriate psychological treatment.