Trichotillomania
Compulsive hair pulling.
A disorder characterized by the repeated urge to pull out scalp hair, eyelashes, eyebrows or other body hair.
It is believed to be related to obsessive-compulsive disorder.
Treatment may include cognitive-behavior therapy and medications such as Prozac.
From tricho-, hair + Greek till(ein) to pluck, pull out + -o- + -mania.