Dandruff is considered to be caused by seborrheic dermatitis because the hormone secretion in the body is more vigorous, stimulating the sebaceous glands to cause the sebaceous glands to secrete more exuberantly, and the oil is caused by more. After more oil, bacteria and fungi are more likely to colonize the scalp, forming dandruff. You can use ketoconazole lotion, sulfur ointment, selenium disulfide shampoo, shampoo the medicine on the scalp, massage for 5-10 minutes to promote the absorption of the drug and then wash down. If the scalp is itchy, you can take oral anti-itching drugs, such as loratadine, cetirizine and so on. In addition, you need to eat a light diet, spicy, stimulating food try not to eat, try not to drink whole milk, drink sour milk, at the same time, you can take oral vitamin B1 complex, three times a day, once a piece, mainly caused by puberty, with the growth of age, this disease will be relieved or even better.