McMaster University

Demystifying Medicine
Seminar Series

Obsessive-Compulsive Disorder (OCD)

Obsessive Compulsive Disorder (OCD) is a mental health disorder that affects people of all ages and walks of life, and occurs when a person gets caught in a cycle of obsessions and compulsions. Obsessions are unwanted, intrusive thoughts, images or urges that trigger intensely distressing feelings. Compulsions are behaviors an individual engages in to attempt to get rid of the obsessions and/or decrease his or her distress.

International OCD Foundation