Health anxiety, clinically known as illness anxiety disorder in the DSM-5, is characterized by a persistent preoccupation with having or developing a serious medical condition. The worry is disproportionate to any actual health risk and continues even when medical evaluations and tests reveal no evidence of disease.

Common signs and symptoms include:

• Excessive worry about health. Spending hours each day thinking about the possibility of being seriously ill, even when no symptoms are present or when symptoms are mild and common.
• Frequent body checking. Repeatedly examining your body for lumps, rashes, sores, pain, or other physical changes that might indicate illness.
• Reassurance seeking. Asking doctors, family members, or friends to confirm that you are not sick. The relief from reassurance is typically short-lived.
• Excessive health research. Spending significant time searching the internet for symptom information, often leading to increased alarm rather than comfort.
• Catastrophic interpretation of body sensations. Interpreting normal sensations like a headache, muscle twitch, or digestive rumble as proof of a serious disease.
• Avoidance behavior. Steering clear of hospitals, health-related news, or even routine medical appointments for fear of receiving bad news. Alternatively, some people with health anxiety do the opposite and seek out medical visits excessively.
• Functional impairment. Difficulty concentrating at work or school, disrupted sleep, strained relationships, and withdrawal from social activities because of health-related worry.

Symptoms typically persist for at least six months, though the specific disease that is feared may shift over time. Health anxiety occurs across all age groups but most often begins in early to middle adulthood. Stressful life events, a history of serious childhood illness, or having a close relative with a severe medical condition can increase vulnerability.

Diagnosis

A qualified mental health professional or physician diagnoses illness anxiety disorder by conducting a comprehensive clinical interview. The DSM-5 criteria require that the person is preoccupied with having or acquiring a serious illness, that somatic symptoms are either absent or mild, that there is a high level of anxiety about health, and that the person engages in excessive health-related behaviors such as body checking or avoidance. These patterns must persist for at least six months and must not be better explained by another mental health condition such as generalized anxiety disorder, panic disorder, or obsessive-compulsive disorder.

It is important that a thorough medical evaluation is completed to rule out genuine medical conditions before a diagnosis of illness anxiety disorder is made. Medical and psychological assessment often work hand in hand.

Treatment

Health anxiety responds well to evidence-based psychological treatments. The most studied and recommended approach is cognitive behavioral therapy (CBT). In CBT, individuals learn to identify and challenge catastrophic thoughts about their health, reduce body-checking and reassurance-seeking behaviors, and gradually face avoided situations through structured exposure exercises.

A specialized form of CBT called exposure and response prevention (ERP) has shown strong results. In ERP, the person is gradually exposed to the thoughts and situations that trigger health anxiety while resisting the urge to check, seek reassurance, or avoid. Over time, the anxiety diminishes naturally.

Acceptance and commitment therapy (ACT) is another approach that teaches people to observe anxious thoughts without acting on them and to redirect energy toward personal values and goals. Mindfulness-based interventions can serve as a helpful complement by building the ability to tolerate uncertainty about bodily sensations.

Treatment is most effective when the person has a supportive, consistent relationship with one primary care provider, reducing the pattern of doctor-shopping that can maintain the anxiety cycle.

Occasional concern about your health is normal and even protective. However, when those concerns start to consume significant time each day, when you find that reassurance from doctors no longer calms you, or when worry about illness is interfering with your job, relationships, or ability to enjoy life, it is time to seek professional support.

Consider reaching out to a mental health professional if you recognize several of the following in yourself:

• You spend more than an hour a day worrying about illness or checking your body for symptoms.
• You have visited multiple doctors for the same concern and still do not feel reassured.
• You avoid medical appointments, health news, or everyday activities because of fear.
• Your sleep, appetite, or concentration is suffering because of health-related thoughts.
• Family members or close friends have expressed concern about the extent of your health worries.

A licensed psychologist, clinical social worker, or psychiatrist experienced in anxiety disorders can provide an accurate assessment and a personalized treatment plan. Many people with health anxiety experience meaningful improvement within a course of structured therapy.

For more information, you can visit these trusted resources:

• American Psychological Association: Anxiety
• NHS: Health Anxiety
• National Institute of Mental Health: Anxiety Disorders

If you are in crisis or experiencing thoughts of self-harm, please contact the 988 Suicide and Crisis Lifeline by calling or texting 988, or go to your nearest emergency department.