Obsessive–compulsive disorder
There is another mental disorder similar to obsessive–compulsive disorder called Obsessive–Compulsive Personality Disorder or OCPD. The difference between the two is that people with obsessive–compulsive disorder know that something is wrong and become stressed because of their obsessive thoughts. People with obsessive–compulsive personality disorder do not know that something is wrong, and they like their obsessions and compulsions.