The scalp always appears on the head, consider that it may be related to the shampoo alkaline too strong. It is recommended that it is best to choose neutral or weakly acidic shampoo products for shampooing, such as shampoo with a pH value of 5.5-7.0, and the shampoo water temperature is not recommended to be too high to avoid stimulating the scalp. Sometimes it also leads to fungal growth, you can try to use selenium disulfide lotion, ketoconazole lotion, etc. together with it twice a week, and change it to once a week when it gets better. At the same time, you can appropriately supplement zinc sulfate and B vitamin complex, which are also more effective for dandruff. The treatment of dandruff also requires attention to rest, avoiding tension and anxiety, not being partial to food or diet, and eating more mixed grains and dried fruits, etc. can also help reduce dandruff.