<unk>  is a mental disorder on the obsessive-compulsive spectrum that is characterized by the repeated urge or impulse to pick at one's own skin to the extent that either psychological or physical damage is caused.
Excoriation disorder
Trichotillomania
Necrospermia
Papulosquamous disorder
Adermatoglyphia
Oral galvanism
Pellagra
Trichostasis spinulosa