Obsessive Compulsive Disorder is made up of two major components. The first component is the obsession, and the second is the compulsion. Obsessions are the persistent, unwanted thoughts, images or ideas. These thought are unwanted. The compulsion is a repetitive behavior that people feel they must perform, to ease the anxiety of the thought. For example, I know I locked the door. However, I get out of bed 5 times in a row to check if I locked the door. OCD is classified as an anxiety disorder, as obsessions cause anxiety. OCD is not as prevalent as other anxiety disorders, but people do suffer from it. Five forms of obsessions include wishes, impulses, images, ideas and doubts.