Obsessive-Compulsive Disorder

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Obsessive-Compulsive Disorder

Medically reviewed · Ratel Health editorial team · Sunday, 16 August 2026

A condition involving recurrent, unwanted thoughts (obsessions) and repetitive behaviors or mental acts (compulsions) performed to reduce distress.

Overview

Obsessive-compulsive disorder (OCD) involves obsessions — recurrent, intrusive thoughts, images, or urges that cause distress — and compulsions, which are repetitive behaviors or mental acts performed to reduce that distress or prevent a feared outcome.

Signs and Symptoms

Common themes include contamination concerns, fears of harm, need for symmetry or exactness, and intrusive taboo thoughts, paired with behaviors such as excessive checking, washing, counting, or mental rituals. Experiencing one or more of these symptoms does not necessarily mean that a person has this condition. Diagnosis requires an appropriate clinical evaluation.

Causes and Risk Factors

The exact cause is not fully understood. Genetic factors, differences in specific brain circuits, and learning processes that reinforce compulsive behavior are all associated with OCD.

Diagnosis

A diagnosis should be made by a qualified healthcare professional following a comprehensive clinical assessment. Clinicians may use established diagnostic frameworks such as DSM-5-TR and/or ICD-11 as part of a comprehensive assessment.

Treatment

Treatment depends on the individual’s symptoms, clinical history, severity, age, co-occurring conditions, and other relevant factors.

Psychotherapy

Exposure and response prevention, a form of cognitive behavioral therapy, has evidence supporting its use and is considered a first-line psychotherapy for OCD.

Medication

Certain antidepressant medications, particularly SSRIs, are FDA-approved for OCD and may be recommended, sometimes at higher doses than used for depression. Medication decisions should be made with a qualified prescribing healthcare professional. Do not start, stop, or change a prescribed medication based solely on information on this page.

Living With Obsessive-Compulsive Disorder

Practicing skills learned in therapy, reducing reassurance-seeking, and maintaining consistent treatment follow-up can support symptom management.

When to Seek Professional Help

Professional evaluation may be appropriate if symptoms persist, worsen, cause significant distress, or interfere with work, school, or relationships.

Emergency Situations

If a person may be in immediate danger, is experiencing a medical or psychiatric emergency, or may harm themselves or another person, seek immediate assistance through appropriate local emergency services.

Outlook

OCD is a treatable condition; many people experience meaningful symptom reduction with evidence-based treatment, although some may need ongoing management.

Related Conditions

Body Dysmorphic Disorder

A condition involving preoccupation with perceived flaws in physical appearance that are not observable or appear slight to others.

Hoarding Disorder

A condition involving persistent difficulty discarding possessions, regardless of actual value, due to a perceived need to save items and distress associated with discarding.

Trichotillomania

A condition involving recurrent pulling out of one’s own hair, resulting in hair loss, along with repeated attempts to decrease or stop the behavior.

Excoriation Disorder

A condition involving recurrent skin picking that results in skin lesions, along with repeated attempts to stop.

Postpartum Obsessive-Compulsive Disorder

A presentation of obsessive-compulsive disorder occurring in the postpartum period, often involving intrusive, unwanted thoughts about harm coming to the baby.

Medical Information Disclaimer

Ratel Health provides general educational information and does not provide medical diagnosis, treatment, or individualized medical advice. Information on this page is not a substitute for evaluation or care from a qualified healthcare professional. Do not use this information to diagnose yourself or another person, or to start, stop, or change treatment or medication without consulting an appropriately qualified healthcare professional.

References

  • American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR).
  • National Institute of Mental Health.
  • U.S. Food and Drug Administration.
  • World Health Organization. International Classification of Diseases, 11th Revision.