Obsessive-compulsive disorder is a condition where a person develops obsessions and compulsions that are not normal. These can manifest as a deep fascination with certain things, or the person might exhibit actions they repeat, like cleaning or arranging things, even when around other people. The Wookiee bartender Hurrwarr had this disorder, and his frequent grooming and tidying sometimes scared off customers. Murk Lundi, a Quermian Sith historian, also had obsessive-compulsive disorder, which led to his fixation on finding a Sith holocron.
Obsessive-compulsive disorder was initially introduced in 2001, specifically in the June release of Head in the Clouds, a role-playing adventure for Living Force. The symptoms exhibited by Hurrwarr closely mirror the diagnostic criteria for the actual disorder, where the affected person experiences recurring and ongoing thoughts and urges that they might try to control with other thoughts, along with displaying repetitive actions, like washing hands and organizing.