OCD stands for Obsessive-Compulsive Disorder. It is a long-lasting mental disorder in which a person experiences uncontrollable and recurring thoughts (obsessions) and engages in repetitive behaviors (compulsions) . People with OCD may have obsessions, compulsions, or both. Obsessions are repeated thoughts, urges, or mental images that are intrusive, unwanted, and make most people anxious. Compulsions are repetitive behaviors or mental acts that a person feels driven to perform in response to an obsession. The types of obsessions and compulsions can vary widely among individuals with OCD. OCD is usually considered a lifelong disorder, and its symptoms can range from mild to severe and time-consuming, which can become disabling.