Hair loss may be caused by kidney deficiency, but not all hair loss is caused by kidney deficiency, for example, damp heat or blood deficiency can also cause hair loss. The hair growth cycle is divided into anagen, diapause and regression. Under normal circumstances, the number of hair loss is roughly balanced with the number of hair growth, and a person will lose about 100 hairs per day. When the amount of hair loss is too much, it is a pathological condition and needs to be seen by a dermatologist. If hair loss is accompanied by nightmares and physical and mental fatigue, it may be due to kidney deficiency. However, if it is seborrheic alopecia, it has nothing to do with kidney deficiency, but is mainly caused by damp-heat fumigation or damp-heat in the liver meridian, mainly manifesting as a particularly greasy scalp, with hair loss mainly on the top of the head, and accompanied by thinning and softening hair. In daily life, you should keep a happy mood, avoid irritation, regular rest and rest time, light diet, can eat black sesame, walnuts and other foods that help hair growth. In addition, often massage the scalp to promote blood circulation, also help hair growth.