Seborrheic dermatitis is a common disease affecting areas rich of sebaceous glands. The incidence is be-tween 1 to 3% and markedly increases in HIV carriers, AIDS and neurologie diseases. The authors give the basic characteristics of the disease, clinical symptoms, its occurrence in predisposed patients (neurological diseases and HIV/AIDS), an overview of aetiopatogenic factors with speciál regard to the influence of Malassezias, to immunological and other factors and review the possibilities of local and systemic therapy.

        Key words: seborrheic - dermatitis - Malassezia - therapy