Obsessive-Compulsive Disorder.

Symptoms of obsessive-compulsive disorder (OCD) include repetitive, unwanted, intrusive thoughts (obsessions) and irrational, excessive urges to perform certain behaviors (compulsions). Despite sometimes knowing that their thoughts and behavior don’t make sense, people with OCD are often powerless to stop them. A person typically develops symptoms during childhood, adolescence, or early adulthood, although males often show signs younger than females.