Dandruff (or Pityriasis) is excessive flaking that manifests with scales that are deposited on the scalp and hair. A cause of the appearance of dandruff is the action exerted by microbial agents including the pityrosporum ovale which aggravates the peeling and generates an annoying itch. Affects at least 45% of men and women, but especially men between sixteen and thirty years. Especially in winter and spring. To act in depth a specific and constant treatment is needed.