Seborrheic dermatitis is a common skin disease that primarily affects areas of the skin with a high amount of sebaceous glands, such as the scalp, face, and upper body. Seborrheic dermatitis is associated with the yeast Malassezia, which is usually present on the skin, but can cause inflammation in some people. Symptoms include redness, itching, skin peeling or dandruff. The disease is not contagious, it can be well treated, but it cannot be cured. Seborrheic dermatitis is treated with the use of antifungal shampoos and creams and local corticosteroids.