Washing your hair with rice water can’t make gray hair black. 1. Amoy water, that is, a water solution obtained after washing rice, normally weakly acidic, may contain a small amount of B vitamins, external use does not have therapeutic efficacy, so it can not help gray hair black. 2. Treatment of gray hair black, need to clarify the causes of gray hair, targeted treatment. Vitiligo caused by gray hair, can follow the doctor’s instructions through the use of glucocorticoid drugs (such as halomethasone), calcium-modulated phosphatase inhibitors (such as tacrolimus) to improve the symptoms of gray hair. Gray hair caused by mental factors, you need to regulate the mind, improve the bad habits of work and rest. To change the phenomenon of gray hair, it is recommended to go to the hospital, under the guidance of a professional doctor for drug treatment, not blindly believe in the prescription.