Seborrheric dermatitis is a chronic, inflamed redness and scaling of the skin. It can involve the scalp and face. When this condition occurs in infants, it is sometimes called cradle cap. In adults, seborrheic dermatitis of the scalp is called dandruff.
The cause of seborrheic dermatitis is not known. The skin of the scalp, and sometimes the face, becomes inflammed and flakes off.
The cause of seborrheic dermatitis is unknown. It tends to run in families. Some individuals have an overgrowth of yeast organisms that is linked with this condition. Those with neurologic disorders, immunodeficiency disorders such as HIV, and extended hospital stays can have severe cases of seborrheic dermatitis.