Psychocutaneous disorders.

Dermatologic conditions are commonly associated with psychiatric sequella, eg, urticaria, alopecia, psoriasis, or acne. Moreover, the onset and course of dermatologic disorders may be significantly influenced by stress, emotional disturbances, or psychiatric disorder. Compulsions involving the skin, excoriations, or hair pulling (trichotillomania) are the more frequently encountered problems. In some cases, skin conditions are self-induced or reflect signs or symptoms of an underlying psychiatric disorder, including psychosis or obsessive-compulsive disorder. Additionally, skin lesions have been frequently described in case reports of factitious dermatitis. Finally, adverse effects of psychotropic drugs may cause dermatologic side effects, mostly idiosyncratic skin eruptions. These problems are discussed with emphasis on clinical features, comorbidity, and psychiatric management.