Young people with long gray hair, mainly related to the body type, usually blood heat. It may also be hereditary, and may be caused by irregular life, often stay up late, there are usually the following reasons: 1, genetic factors: most of them are related to heredity, often have a certain family; 2, psychological factors: psychological stress, fatigue, stay up late, irregular life, etc., after a relatively large psychological stimulation, the body produces a stress response, so that neuro-endocrine dysfunction, which may lead to hair tissue inside the melanocyte function is damaged, and can not be normal synthesis of melanin, white hair; 3, malnutrition: if the body long-term lack of protein, vegetable oil, vitamin B1, vitamin B2, vitamin B6, or long-term lack of copper, cobalt, iron and other inorganic salts in the diet, will affect the synthesis of melanin, so that the hair from black to white; 4, disease factors: cardiovascular disease, abnormal thyroid function, the Anemia, diabetes and other diseases, local immune status abnormalities, affecting the function of melanocytes, may cause the hair to turn white. Try to relax, stay up less, and have a regular life. If it is caused by disease, actively treat the primary disease. You can properly eat cinnamon, lotus seeds, dates, etc., for hair blackening or have a certain effect. You can adhere to the daily morning and evening massage on the scalp with the fingertips, rubbing the scalp. You can also keep your scalp and hair clean by combing your hair diligently, while accelerating the blood circulation and increasing the nutrition of hair follicles, so as to achieve the effect of preventing hair from turning white.