There is no hair on both sides of the forehead, which may belong to seborrheic alopecia. The occurrence of seborrheic alopecia is the upward movement of hairline, which is mainly manifested as M-type alopecia on both sides of forehead. This seborrheic alopecia can be treated with oral antiandrogen, and most of them can be treated with finasteride. Then apply minoxidil tincture or spray, 1 day twice. At the same time, seborrheic alopecia is a kind of hair loss mainly caused by genetic factors, which is related to acquired factors So try not to stay up late and eat something spicy.