what type of mental illness is obsessive-compulsive disorder
For other uses, see OCD (disambiguation). Not to be confused with Obsessiveâcompulsive personality disorder. Obsessiveâcompulsive disorder (OCD) is a mental disorder where people feel the need to check things repeatedly, perform certain routines repeatedly (called rituals), or have certain thoughts repeatedly. People are unable to control either the thoughts or the activities for more than a short period of time.