A skin condition characterized by greasy or dry white scales , with or without associated reddened skin.
Cradle cap is the term used when seborrheic dermatitis affects the scalp of infants.
The cause is unknown. Seborrheic dermatitis appears to run in families. Stress , fatigue , weather extremes, oily skin , infrequent shampoos or skin cleaning, skin disorders such as acne , obesity , and use of lotions that contain alcohol may increase the risk of seborrheic dermatitis. Neurologic conditions, including Parkinson's disease , head injury , and stroke can also be associated with seborrheic dermatitis. The AIDS complex or syndrome also seems to be associated with a higher incidence of seborrheic dermatitis.