national art day The DSM-IV-TR, it of formal psychiatric diagnoses, categorizes trichotillomania just as one impulse control disorder. That would help it become akin to pathological nail-biting, fire-setting, stealing, gambling, skin-picking, and explosive behavior. But some would categorize trich as a possible anxiety, much like obsessive-compulsive disorder (OCD). Others believe trich is a tic disorder, even a dependency. It?s interesting that trichotillomania continues to be acknowledged as a ?disorder? for only about twenty years.