Seborrheic dermatitis is a common problem of unknown etiology. Approximately 3 to 5% of adults have seborrheic dermatitis. The term is derived from the distribution of this disorder, in which erythematous, scaly patches develop in areas that are rich in sebaceous glands, such as the scalp, face, and upper trunk. The term "seborrhea" refers to excess sebum secretion, although this finding is not uniformly present in patients with seborrheic dermatitis. Seborrheic dermatitis was first described by Paul Gerson Unna, who also suspected Malassezia furfur (Pityrosporum ovale) as a causative factor. Seborrheic dermatitis doesn't affect your overall health, but it can be uncomfortable and cause embarrassment. It isn't contagious, and it's not a sign of poor personal hygiene. Seborrheic dermatitis is usually a long-term condition. You may need many repeated treatments before the symptoms go away (and they may return later). An infantile and an adult form of seborrheic dermatitis are distinguished, the former is being confined to the first 3 months of life, while the latter is chronic with a peak in the fourth to sixth decades. Dandruff and cradle cap are common names for seborrheic dermatitis. Babies 3 months and younger often get cradle cap: greasy yellow or brown scales on their scalp. It usually goes away before they're a year old, although it can come back when they reach puberty. A number of medications are able to control seborrheic dermatitis including: antifungals, topical corticosteroides, and keratolytics. Often the best results come from a combination of treatments, both medication and changes of the lifestyle. Skin can itch, burn, or look red. Because it can look like other skin conditions, you should see a dermatologist to get a diagnosis and the right treatment. The dermatologist will ask about your medical history and look at your skin. The role of nurse when treating patients with seborrheic dermatitis is mostly educational. Patient's lifestyle (nutrition, selfcare, clothes, being outdoors) needs to be adapted to a new situation in order to help themselves toward a faster recovery. Moreover, the nurse must reduce patient's feeling of uncomfort, fear and anxiety. Nurse's role is of great importance and can have a significant impact on patients recovery, by prompt education and the right approach.