[Psychosomatic dermatology - state of the art].

Based on the current literature, the paper gives an overview of the state of knowledge in psychosomatic dermatology. The authors propose the following classification: (1.) Dermatologic problems as a consequence of psychic disorders (e.g. factitious disorder, trichotillomania, dysmorphophobia, delusions of parasitosis etc.); (2.) Multifactorial dermatologic disorders, which can be substantially influenced by psychological factors (e.g. atopic dermatitis, psoriasis, chronic urticaria etc.); (3.) Psychic disorders developing as a consequence of disfiguring or life-threatening dermatoses (e.g. adjustment disorder, depressive disorder, anxiety disorder); (4.) Comorbidity with other psychiatric disorders. Psychosomatic dermatology developed from an anecdotal initial stage to more systematic research with larger numbers of patients, employing control groups and psychometric instruments. During the last decade, research focused on psychophysiological and psychoneuroimmunological mechanisms which influence dermatologic disorders. This course of development and the current state of knowledge are presented for atopic dermatitis and psoriasis.