Trichotillomania (TTM) is a neuropsychiatric disorder characterized by chronic, repetitive, or compulsive hair pulling resulting in noticeable hair loss. The activity causes distress to the individual and often interferes with functioning. Affected individuals may develop physical complications and often have overlapping psychologic disorders, such as Tourette syndrome (GTS; 137580) or obsessive-compulsive disorder (OCD; 164230) (review by Novak et al., 2009). [from
OMIM]