by Scholten A
(Hypochondria; Hypochondriasis)


Illness anxiety disorder is persistent fear of having a serious illness. The fear lasts, even when there is no illness. If not treated, the fear can affect daily life.


The cause of this disorder is not known.

Risk Factors

Things that may raise the risk of illness anxiety disorder are:

  • Family history of this disorder
  • Having a serious childhood illness
  • Mental health problems such as depression , anxiety, or personality disorder
  • Childhood abuse
  • Seeing violence in childhood
  • A stressful experience with illness
  • Past trauma
Brain—Psychological Organ
Brain Man Face
Chemical imbalances and traumatic life experiences may contribute to the development of illness anxiety disorder.
Copyright © Nucleus Medical Media, Inc.


Symptoms are health worries that last at least 6 months. They are very upsetting. They may affect social life and work.

They include:

  • Fear of serious illness
  • Thinking minor symptoms are from serious illness
  • Many physical complaints that often change

They lead to:

  • Checking oneself often
  • Repeat doctor visits and tests
  • Reading about health often
  • Changing doctors often
  • Trying many herbal or natural products


The doctor will ask about your symptoms and health history. A physical exam will be done. If the exam shows no disease, the doctor may order other tests. If no illness is found, the doctor may suspect illness anxiety disorder. Diagnosis is based on fear of illness that lasts:

  • At least 6 months
  • Despite negative tests
  • And is not due to other mental health problems


Illness anxiety disorder is treated with supportive care. A doctor and counselor may work with the patient. The goal is to reduce anxiety and improve functioning.

Options may be:


There are no current guidelines to prevent this condition.


American Counseling Association 

American Psychiatric Association 


Canadian Psychiatric Association 

Canadian Psychological Association 


Antidepressant efficacy in generalized anxiety disorder. EBSCO DynaMed website. Available at: . Accessed March 10, 2021.

Anxiety disorders. National Institute of Mental Health website. Available at: Accessed March 10, 2021.

Illness anxiety disorder. Merck Manual Professional Version website. Available at: Accessed March 10, 2021.

Scarella TM, Boland RJ, et al. Illness anxiety disorder: psychopathology, epidemiology, clinical characteristics, and treatment. Psychosom Med. 2019;81(5):398-407.

Somatic symptom disorder. EBSCO DynaMed website. Available at: Accessed March 10, 2021.

Revision Information

  • Reviewer: EBSCO Medical Review Board Adrian Preda, MD
  • Review Date: 01/2021
  • Update Date: 00/31/2021