- Formerly called:
- hypochondriasis or hypochondria
- Related Topics:
- somatoform disorder
- On the Web:
- MSD Manual - Professional Version - Illness Anxiety Disorder (Oct. 28, 2026)
illness anxiety disorder
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What is illness anxiety disorder?
Illness anxiety disorder, also known as health anxiety or hypochondria, is a mental health condition characterized by an excessive and prolonged preoccupation with having or developing a serious illness. Individuals with this disorder misinterpret normal bodily sensations, such as a rapid heartbeat or a cough, as signs of severe medical conditions like cancer or heart attacks. This fear persists even after medical examinations confirm the absence of any physical illness, and reassurances from physicians offer little to no lasting relief.
This disorder often co-occurs with other conditions like depression or other anxiety disorders. While it can be chronic, illness anxiety disorder is treatable, often with cognitive behavioral therapy and sometimes with antidepressants.
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What are the main signs or symptoms of illness anxiety disorder?
Illness anxiety disorder, also known as hypochondria, is characterized by an excessive and prolonged preoccupation with having or developing a serious illness. Individuals with this disorder often misinterpret normal bodily sensations, such as a rapid heartbeat or minor aches, as signs of a life-threatening condition.
Key signs include:
* Excessive worry about health despite a lack of physical symptoms or after medical examinations have cleared them.
* Preoccupation with normal bodily functions and sensations, believing they indicate serious illness.
* Frequent research into illnesses, sometimes termed cyberchondria when using the internet.
* Fears that persist even after reassurance from healthcare professionals.This condition can significantly impact daily life and often co-occurs with other mental health conditions like depression or anxiety disorders.
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How is illness anxiety disorder different from having a real physical illness?
Illness anxiety disorder is distinct from having a real physical illness because it involves an excessive preoccupation with having or developing a serious disease, despite the absence of significant physical symptoms. Individuals with this disorder misinterpret normal bodily sensations as signs of severe illness, leading to persistent health-related anxiety.
While someone with a real illness experiences physical symptoms that are medically explained, a person with illness anxiety disorder may continue to fear they are ill even after thorough medical examinations confirm no underlying physical condition. This disorder is characterized by exaggerated worry about health, often accompanied by extensive research into potential illnesses, sometimes referred to as cyberchondria. It is important to note that individuals with illness anxiety disorder remain capable of considering that their fears might be unfounded, unlike those with delusional beliefs about their health.
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What causes someone to develop illness anxiety disorder?
Illness anxiety disorder, also known as health anxiety or hypochondria, arises from an excessive preoccupation with illness and a tendency to believe one has a serious disease based on insignificant physical signs. This condition is thought to stem from misinterpreting normal bodily functions, leading to health-related anxiety. While the exact causes are complex and can involve a combination of factors, genetic predispositions, biochemical imbalances, and stressful life events can contribute to the development of anxiety disorders. Individuals with illness anxiety disorder may excessively research symptoms, exaggerate minor aches, and remain fearful even after medical reassurance. This disorder often co-occurs with other mental health conditions like depression or other anxiety disorders.
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How do doctors diagnose illness anxiety disorder?
Diagnosing illness anxiety disorder involves a comprehensive approach, primarily focusing on a thorough medical history and psychological evaluation. Doctors look for an excessive preoccupation with illness, a persistent fear of having or developing a serious disease, and misinterpretation of normal bodily sensations as signs of severe illness. This concern often continues for at least six months, even after medical examinations confirm no physical abnormality.
While physical examinations and diagnostic tests are part of the process, the patient's history and communication are most crucial. Psychological tests may also be used to differentiate psychiatric from organic issues and assess personality functioning. It's important to distinguish illness anxiety disorder from other conditions like somatic symptom disorder, where the concern is about symptoms themselves rather than the fear of having a disease.
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What treatments are available to help people with illness anxiety disorder?
Illness anxiety disorder can be treated with cognitive behavior therapy (CBT) and, in some cases, antidepressants, particularly if depression is also present. CBT helps individuals recognize and alter inaccurate or negative thought patterns, which is crucial for managing health-related anxiety stemming from misinterpreting bodily cues. Exposure therapy, a component of CBT, can also be beneficial by gradually confronting feared stimuli in a safe environment to reduce avoidance behaviors. While illness anxiety disorder can be chronic, treatment can lead to recovery and improved functioning.
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illness anxiety disorder, mental disorder characterized by an excessive preoccupation with illness and a tendency to fear or believe that one has a serious disease on the basis of the presence of insignificant physical signs or symptoms. Illness anxiety disorder is thought to be derived from the misinterpretation of normal bodily functions and cues, thereby precipitating health-related anxiety.
Individuals with illness anxiety disorder may excessively research an alleged illness or symptom (known as cyberchondria when the research medium is the Internet) and become convinced that they are ill even though such physical signs are absent. They may exaggerate the medical significance of minor aches and pains, becoming morbidly and obsessively preoccupied with the thought of a life-threatening illness. Their fears usually persist even after a thorough examination by a physician has established that no physical abnormality exists, and the physician’s reassurances have only a slight or temporary effect on such individuals’ apprehensions. Typical affected individuals do not become delusional about their health, however; they remain able to consider or admit the possibility that their fears are unfounded. Some individuals go from doctor to doctor in their effort to enlist medical resources to deal with the imagined illness; other individuals, however, avoid seeking medical care. Clinical diagnosis of illness anxiety disorder is based on the persistence of illness-related fears and associated behaviour for six or more months.
Although fears of illness or medical interventions are common in the general population, past prevalence estimates for clinically defined illness anxiety disorder (when the disorder was known as hypochondriasis) indicate that the condition is relatively rare. It is equally prevalent in males and females. Whether there is any association with socioeconomic status, educational level, race, or marital status is unclear. Onset can occur at any age, but it tends to manifest in early adulthood. Illness anxiety disorder often co-occurs with other psychiatric conditions, which may include depression, an anxiety disorder, or a personality disorder. Illness anxiety disorder is distinguished from other psychosomatic illnesses by its core feature of fear of having or contracting a disease, as opposed to concern about symptoms (as in somatic symptom disorder), concern about physical appearance (as in body dysmorphic disorder), or disturbances in motor or sensory functions (as in conversion disorder).
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Although illness anxiety disorder tends to be chronic and episodic, some patients do recover. Many patients respond to an individualized treatment approach, which may include cognitive behaviour therapy. Pharmacotherapy, such as the use of antidepressants, may also be used, especially when symptoms of depression are present.