Gray hair blackening cannot be treated by small remedies and does not have any scientific basis. Improvement of gray hair black can be based on the cause of the treatment, causes gray hair causes age factors, nutritional deficiencies, mental factors, disease factors, can usually use general treatment, medication and other methods to alleviate such symptoms. 1. Age factor: as the human body grows older, the hair will turn gray, which is a normal physiological phenomenon, without treatment. 2. Nutritional deficiencies: if the body lacks vitamins, trace elements, etc., can also cause hair gray, you can go to the hospital to improve the relevant examination, to clarify the lack of species and then timely supplement. 3. Mental factors: If mental factors cause white hair, you can adjust your mindset, maintain an optimistic state of mind, with the growth of time, can promote the repair of follicle melanocyte function, can improve white hair. 4. Disease factors: If it is vitiligo, albinism and other disease factors caused by white hair, you need to go to the hospital for examination, combined with the body’s condition, under the guidance of the doctor to use prednisone acetate, levamisole and other drugs to regulate. There are many causes of gray hair, different causes, the treatment plan will be different, if necessary, the patient can also go to the hospital for examination, for the cause of the treatment. The above drugs should be used in accordance with medical advice.