Having gray hair at the age of 35 is generally normal. It is possible that this condition is due to a gradual decrease in the ability of melanocytes to produce melanin as a result of the decrease in tyrosine activity at a certain age. Some people may also have gray hair due to genetic factors, which is normal and does not cause harm to the body. Gray hair includes congenital or acquired. Among the acquired gray hair, graying and whitening of hair in old age is one of the manifestations of aging and is a physiological phenomenon. Premature gray hair is related to genetics, often with a family history, some accompanied by medical diseases, such as autoimmune diseases, cardiovascular diseases, pernicious anemia, etc. Having gray hair at the age of 35 may also indicate the presence of abnormal conditions, which may be due to mental reasons, lack of nutrition, physical diseases and other factors, such as long-term anxiety, depression, sadness, tension, etc. can also cause gray hair. Skin diseases that involve the scalp such as vitiligo and tuberous sclerosis of the scalp can lead to localized gray hair and should be distinguished. When there is gray hair first of all to change the bad habits of life and rest, to develop a regular life, appropriate to participate in physical exercise, to enhance physical fitness, usually pay attention to avoid excessive late night and mental stress. Secondly, you can also eat more black beans, black sesame, walnuts to promote black hair, eat more fresh vegetables and fruits, and eat less spicy, stimulating food. If you do not see significant improvement, it is recommended that further examination to clarify whether there are disease factors caused.