Dandruff is a condition of the scalp. This condition causes white flakes of skin to appear and sometimes it can be associated with other skin problems such as seborrhoea or psoriasis. The treatment of dandruff varies according to the severity of each case, but it includes several cosmetic medications aimed at treating its causes and decreasing the symptoms of itching and redness of the skin. Typically, shampoos or solutions are prescribed with an antifungal active principle, intended to inhibit microbial proliferation, and combined with anti-seborrhoeic and antipruritic substances. Seborrhoea is a disorder of the sebaceous glands that produce excessive secretion of fat or sebum, causing the hair to have a greasy and shiny appearance. There could be very different causes (stress, hormonal, genetic, some medications, food). Treatment of seborrhoea depends on the cause and may include shampoos or lotions with selenium and zinc pitirione, or medication to treat the associated pathology.