Gray hair may be due to kidney deficiency, or it may be related to factors such as family genetics, age, and lifestyle habits. The causes of gray hair can be divided into congenital and acquired factors. The appearance of gray hair in patients with less white head and older people is mainly related to genetics, and there is no solution yet. If we look at the theory of Chinese medicine, the kidney is in the hair, and if the kidney energy is sufficient, the hair will be dark and shiny and more moist, and premature graying of the hair may be related to the lack of kidney energy. The appearance of gray hair in teenagers is mostly seen in the case of excessive life stress, long-term staying up late, and poor dietary habits, which cause some degree of damage to the kidneys. Patients can apply Chinese herbal medicine for conditioning treatment, with appropriate intake of black beans, black sesame seeds, chasteberry and other foods. During the period of medication, you should quit smoking and drinking, eat a light diet, avoid spicy and stimulating foods, and maintain a regular work and rest schedule.