Obsessive-compulsive disorder (OCD) is a prevalent, chronic and disabling disorder characterised by obsessional thoughts and compulsive behaviours (American Psychiatric Association, 1994). It is a condition shrouded with stigma and shame.

Although effective psychological and pharmacological treatments are available, delays in diagnosis and treatment of the disorder occur. Better recognition and improved access to evidence-based treatment is needed.

This module provides guidance on how common obsessive-compulsive disorder is, its aetiology and how best to recognise people with the disorder. Aimed at psychiatrists and mental health workers in general adult, forensic, old age and child and adolescent psychiatry, it will take the reader through the epidemiology, aetiology, co-morbid disorders, diagnostic issues and differential diagnoses of OCD.

By the end of this module the reader should be able to demonstrate an understanding of the complexities involved in the assessment and management of OCD.

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