Excessive dandruff is generally caused by excessive oil secretion or bacterial infection. 1. It is suggested to put a small amount of white vinegar when washing your hair, which can not only inhibit bacteria but also effectively inhibit oil secretion; 2. Wash with ketoconazole hair dew twice a week; 3, reasonable shampooing, shampooing too much will reduce the thickness of scalp sebum and accelerate sebum secretion. Combs, pillows and pillow towels should also be kept clean, and it is best not to mix them; 4. The water temperature of shampoo should be appropriate. Too cold water is difficult to achieve the purpose of cleaning. Overheated water is more likely to stimulate the scalp, leading to excessive oil secretion by the scalp. It is recommended to wash your hair with warm water. 5, 2, do not drink alcohol, eat less greasy and irritating food, eat more vegetables and fruits and alkaline food, such as kelp, seaweed and so on. ; 6, often gently comb the hair, comb it 2 ~ 3 times every morning and evening, which can promote the blood circulation of the scalp, increase the nutrition of the hair, be conducive to the growth of hair, and reduce the keratinization of scalp epithelial cells.