Scaly skin condition in babies, particularly affecting scalp.
Oily, yellowish scales. Often nappy rash. Not usually very itchy.
In adults, affects face (esp around nose and ears) and can affect chest and upper back. Dandruff is a mild form. Can be itchy, can lead to hair loss but more usually cosmetic concerns.
Overgrowth of Malassezia fungus found, antifungals work well. Else topical steroids. In adults, anti -androgens.