Dandruff's itchiness and flaking are virtually always manageable. To lessen oil and skin cell buildup and to start treating moderate dandruff, try routinely washing your hair with a light shampoo. Try using a medicated dandruff shampoo if that doesn't work. A medicated shampoo can be used two to three times a week for certain people, with ordinary shampooing on other days as needed. Less frequent shampooing and a moisturizing conditioner for the hair or scalp would be beneficial for people with drier hair.