Itchy scalp and dandruff are considered to be caused by seborrheic dermatitis or fungal infections. Seborrheic dermatitis is associated with malassezia colonization, seborrhea, neurotransmitter abnormalities, nutritional deficiencies, long-term use of medications, and the living environment, and is most commonly seen in adults and newborns. The common areas are the face, scalp, trunk and other rich sebaceous areas. When fungal infection occurs in the scalp area, itchy and scaly scalp dandruff will appear, and it is easy to infect itself, and it is relatively troublesome to treat. Seborrheic dermatitis caused by itchy scalp with dandruff, its treatment is mainly to use glucocorticosteroids, such as hydrocortisone, Haxinaid cream. Fungal infection caused by dandruff dandruff, its treatment is mainly based on antifungal therapy, commonly used drugs are nitrate miconazole cream, terbinafine cream, ketoconazole cream and so on.