Onychotillomania: An underrecognized disorder.

Onychotillomania is an uncommon and likely underreported condition in which patients repetitively manipulate the different constituents of the nail unit. Onychotillomania is characterized by a range of nonspecific findings, including bizarre morphology of the nail plate and damage to the nail bed and periungual skin. Histopathological changes are also nonspecific, but may be viewed as analogous to lichen simplex chronicus and prurigo nodularis of the skin. Clinical history is essential to making this diagnosis, as effective treatment modalities may focus on behavioral therapies and psychiatric medications.