Unwanted repetitive thoughts and behaviors. Review possible symptoms, contributing factors, assessment, warning signs and care options.
About Obsessive-Compulsive Disorder
Unwanted repetitive thoughts and behaviors
Obsessive-Compulsive Disorder (OCD) involves a pattern of unwanted thoughts and fears (obsessions) that lead to repetitive behaviors (compulsions).
These obsessions and compulsions interfere with daily activities and cause significant distress.
Editorial update (28 September 2026): structured medical content awaits clinical reviewer sign-off.
How assessment may be approached
A qualified clinician may ask about mood, anxiety, sleep, appetite, functioning, medicines, substances, trauma, physical contributors and personal safety. Assessment is private and aims to understand the pattern before naming a diagnosis.
Options may include psychotherapy, practical support, treatment of contributors, medication when clinically appropriate, safety planning and follow-up. Do not stop prescribed psychiatric medicine without the prescriber's advice.
When to seek prompt care
Seek immediate local emergency or trusted-person support for thoughts, intent or plans of self-harm or harming others, severe agitation, inability to stay safe, psychosis, severe intoxication or inability to meet basic needs.
Symptoms
- Intrusive thoughts
- Repetitive behaviors
- Need for symmetry
- Excessive cleaning
- Checking behaviors
- Distress when unable to perform rituals
Possible causes
- Genetic factors
- Brain structure
- Environment
- Childhood trauma
Care and treatment options
- Cognitive-behavioral therapy (ERP)
- Medication (SSRIs)
- Deep brain stimulation (severe cases)
Key points
- Affects 1-2% of population
- Usually begins in teens/early adulthood
- Chronic condition
- ERP therapy very effective
Preparing for a consultation
- How long symptoms have lasted and what has changed.
- Sleep, appetite, work, relationships and daily functioning.
- Medicines, substances, trauma and physical illness.
- Any safety concerns, urgent warning signs or support available.
Questions worth asking
- Is Obsessive-Compulsive Disorder the most likely explanation for these symptoms, and what alternatives should be checked?
- Which symptoms or findings would require urgent review?
- Are medicines, underlying health problems or lifestyle factors contributing?
- What tests or examinations are needed now, and what can safely wait?
- What treatment or self-care options are reasonable, and when should I be reviewed again?
- What is the expected benefit, limit, cost and follow-up plan for the suggested care?
Related conditions
Related clinicians
Medical information limitations
This page summarizes listed condition information and cannot confirm a diagnosis or choose treatment. Do not start, stop or change prescribed treatment based only on this page.
Common questions
What is Obsessive-Compulsive Disorder?
Unwanted repetitive thoughts and behaviors This is general information; the name describes a possible diagnosis or clinical problem, not a personal diagnosis.
How might a clinician assess Obsessive-Compulsive Disorder?
A qualified clinician may ask about mood, anxiety, sleep, appetite, functioning, medicines, substances, trauma, physical contributors and personal safety. Assessment is private and aims to understand the pattern before naming a diagnosis.
What care may be discussed?
Care options listed include Cognitive-behavioral therapy (ERP), Medication (SSRIs), Deep brain stimulation (severe cases). Which option is appropriate depends on the confirmed cause, severity, preferences and contraindications.
When should Obsessive-Compulsive Disorder be checked urgently?
Seek immediate local emergency or trusted-person support for thoughts, intent or plans of self-harm or harming others, severe agitation, inability to stay safe, psychosis, severe intoxication or inability to meet basic needs.
How should I prepare for a consultation?
How long symptoms have lasted and what has changed. Sleep, appetite, work, relationships and daily functioning. Medicines, substances, trauma and physical illness. Any safety concerns, urgent warning signs or support available. Bring previous reports and a current medicine list where relevant.
Can this page diagnose or treat the condition?
No. A page about Obsessive-Compulsive Disorder can help you understand possible features and questions, but it cannot confirm a diagnosis or choose treatment. A qualified clinician should assess your symptoms, history and any test results.
General information only; it is not a diagnosis or a substitute for a qualified clinician’s advice.