Teenage gray hair may be due to congenital genetics, acquired nutrition and mental stress and other factors, whether to restore normal, need to be combined with specific reasons for analysis: a. Congenital less white head: congenital less white head is mostly related to genetics, generally due to genetic mutations lead to the formation of eumelanin and brown melanin the main raw material tyrosine metabolic pathway is blocked, so the hair color abnormalities, this is generally This kind of general can not be completely restored. Second, the acquired less white head: 1, nutritional factors: hair is an accessory organ of the skin, also need adequate nutrition, if long-term lack of protein, vitamins, vegetable oils, etc., will also lead to hair from black to white. This situation will generally gradually recover after adjusting the diet structure, pay attention to eat more easily generated melanin food, such as black sesame, black buckwheat, black rice, mulberry, etc.; 2, mental factors: adolescent learning pressure, if the spirit has been kept in a highly stressful state, will lead to sympathetic nerve release norepinephrine, norepinephrine makes hair follicles within the melanocyte stem cells overreact, may make melanocytes This can cause premature depletion of the melanocyte stem cells, which can cause the hair to turn gray. In this case, we should first pay attention to the regulation of stress, work and rest, some people will gradually improve after mental relaxation; 3, other diseases: some chronic diseases cause nutritional deficiencies that lead to adolescent gray hair, such as tuberculosis; some endocrine diseases can disrupt the secretion of melanin particles, resulting in adolescent gray hair, such as hyperthyroidism. This first to treat the original disease, generally after the original disease is controlled, the situation of gray hair will also be improved.