What is OCD and do I have it?

Answered by Dr. Nitnem Singh Sodhi · Consultant Psychologist & Psychotherapist · Updated 2026-05-22

Short answer

OCD is defined by intrusive unwanted thoughts (obsessions) that drive repetitive behaviours or mental acts (compulsions) consuming an hour or more a day. Liking things tidy isn't OCD. The free OCI-R screener on this site gives an objective read.

'I'm so OCD about my desk' is one of the most common ways the disorder is trivialised. Real OCD is not a personality quirk — it is a debilitating condition that, untreated, can consume hours of every day.

The clinical definition

Obsessions: intrusive, unwanted thoughts, images or urges that cause significant distress. Compulsions: repetitive behaviours or mental acts the person feels driven to perform to neutralise the obsession. Together they consume more than an hour a day or significantly impair functioning.

Common subtypes

Contamination / washing. Checking (locks, stoves, taps). Symmetry / ordering. Intrusive harm or sexual thoughts (Pure-O). Religious or moral scrupulosity. Relationship OCD.

Treatment that works

ERP (Exposure and Response Prevention) is the gold-standard psychological treatment, often combined with SSRIs at higher doses than for depression. Most patients see substantial improvement within 12–20 sessions.

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