If the dandruff is too much, seborrheic dermatitis may be more likely to be accompanied by a certain degree of itching and a rash with erythema, small papules and pustules. The main treatment consideration is to apply levocetirizine hydrochloride capsules, one capsule every night. Combined with compound glycopyrrolate capsules two capsules three times a day. For rashes such as erythema and papules, topical trimethoprim ointment or paregoric ointment can be used; for small pustules, topical fusidic acid cream, or compound polymyxin b ointment can be used for treatment. At the same time, for dandruff, you can wash your hair with selenium disulfide shampoo about three times a week. Avoid alcohol and a spicy and stimulating diet at the same time as treatment. This disease is mainly caused by allergies or inflammation, infection and other factors, the cause of the disease is not clear.