Trichotillomania

Trichotillomania (pronounced /ˌtrɪkəˌtɪləˈmeɪniə/ TRIK-ə-TIL-ə-MAY-NEE-ə, also known as trichotillosis) is the compulsive urge to pull out (and in some cases, eat) one's own hair leading to noticeable hair loss, distress, and social or functional impairment. It is classified as an impulse control disorder by DSM-IV and is often chronic and difficult to treat.