Too much gray hair may be caused by genetic factors, aging, nutritional deficiencies, mental factors, disease factors and so on. 1. Genetic factors: If one or both parents have a lot of gray hair, the children may inherit this phenomenon. 2. Aging: With the gradual increase in age, all functions age, metabolism slows down, hair follicles lose nutrients, and hair will gradually turn gray. 3. Nutritional deficiencies: may be caused by the lack of nutrients, hair does not get enough nutrients, it will become gray. 4. Mental factors: If you are in a long-term nervous, stressful mental state, it is easy to lead to more gray hair. 5. Disease factors: if vitiligo occurs in the head, in addition to white hair, the scalp underneath it will also appear white spots. Such as albinism, in addition to hair whitening, will also lead to eye pigmentation loss, vision loss and other conditions. Too much gray hair can also be caused by other reasons, ruling out that it is a physiological phenomenon, it is important to consult a doctor in time, and cooperate with the doctor to regulate or treat.