Occupationally induced psoriasis.

Psoriasis of the hands may be triggered by work, especially in occupations involving physical trauma or contact with irritants. When limited to the hands and in absence of other typical lesions, diagnosis can be difficult particularly when coexisting with contact eczema. It is necessary to establish diagnostic criteria which help to establish a relationship between clinical manifestations and noxious stimuli at work. Prevention should be directed to early identification of cases and adequate preemployment physical examinations in order to avoid permanent disability.