Seborrheic dermatitis (SD) is a chronic inflammatory disease that affects more frequently face and scalp. DS occurs in both adults and children, men are more often affected than women. The etiology of the disease is not fully understood, but there are several factors involved in the development of seborrheic dermatitis. The histology of seborrheic dermatitis is similar to psoriasis, sometimes only time will tell which disease is present. The treatment must be non-aggressive, and almost all patients can be treated successfully with topical therapy: antifungal shampoos, creams, lotions, low to medium potency topical corticosteroids, metronidazole gel. Systemic therapy is reserved for severe cases and consists of oral imidazoles, isotretinoin or corticosteroids.