Seborrheic dermatitis is more commonly known as dandruff.  It causes flaking and itching of the scalp, eyebrows, nasolabial folds, ears, and occasionally sternum  The skin rash is in response to a naturally occurring yeast on the skin, pityrosporum ovale.  It is easily treated with a combination of antifungal and anti-inflammatory shampoos and creams.  As with many chronic skin issues, this is something that is controlled, not cured.

Dandruff/Seborrheic dermatitis, the skin condition that cause scaly patches and red skin, mainly on the scalp. It is a common, chronic or relapsing form of eczema/dermatitis that mainly affects the scalp and face. There are infantile and adult forms of seborrhoeic dermatitis. It is sometimes associated with psoriasis . Seborrhoeic dermatitis is also known as seborrhoeic eczema. Dandruff is an uninflamed form of seborrhoeic dermatitis. Dandruff presents as bran-like scaly patches scattered within hair-bearing areas of the scalp. Typically, seborrheic dermatitis presents with scaly, flaky, itchy, and red skin. It particularly affects the sebaceous-gland-rich areas of skin. In adolescents and adults, seborrhoeic dermatitis usually presents as scalp scaling or as redness of the nasolabial fold. Seborrhoeic dermatitis is diagnosed by its clinical appearance and behavior. As malassezia is a normal component of skin flora, its presence on microscopy of skin scrapings is not diagnostic. Skin biopsy may be helpful but is rarely indicated.