Wash your hair every day, even if you use a brand-name shampoo, you won't get dandruff. That's what I do. If you can't do it, you can go to the drugstore to buy Le Cai. It's not an ordinary shampoo, it's a small bottle. I forgot the price. You can ask. Only pharmacies sell them, but ordinary supermarkets don't. That belongs to drug music picking, which is produced by the same company as ordinary music picking.