The main reasons for daily shampooing and dandruff are as follows: 1. seborrheic dermatitis, seborrheic dermatitis will have an unbalanced local oil classification, oily hair loss and increased dandruff. At this time, you need to avoid spicy and greasy food, not to stay up late, avoid smoking and alcohol, you can use oil control shampoo. 2, fungal infection, when there is fungal infection of the scalp there will be a lot of dandruff, and there are red spots, papules, blisters. The actual fact is that you can use ketoconazole lotion as a shampoo topically, twice a week. 3, psoriasis, psoriasis on the head and face will appear a lot of scales, high and low, but scrape off the scales have film phenomenon. Diagnosed as psoriasis caused by dandruff, you need to use the treatment of the original disease, the conventional treatment of psoriasis can be.