[…] with psychogenic itch include depression, obsessive-compulsive disorder, anxiety, somatoform disorders, mania, psychosis, and substance abuse. 2 Body dysmorphic disorder, trichotillomania
[mdedge.com]
Estimated lifetime prevalence of trichotillomania in college students. J Clin Psychiatry 1991;52:415-7. 40. Swedo SE, Rapoport JL. Annotation: Trichotillomania.
[ijdvl.com]
The medical term is 'Trichotillomania'.
[rediff.com]