Of a random sample of new attenders at a dermatology out-patient clinic, 40% were classified as suffering from a psychiatric disorder. There was no correlation between psychiatric morbidity and the severity or site of skin disease. Self-report measures of the behavioural impact of skin disease and attitudes to appearance were related to psychological morbidity. Except in subjects without visible skin pathology (5%) there was no evidence that psychiatric illness was an aetiological factor in the development of skin disease. Self-report measures were used to distinguish between those patients in whom psychiatric morbidity was closely related to skin disease (75%), and those in whom it may be coincidental (20%). Psychological care for the former group is most appropriately provided by physicians, who should be encouraged to improve their detection and management of psychiatric morbidity.