If you want your white hair to turn black, you can't stay up late at first, which is stressful. You can eat more vegetables, fruits and nutritious food at ordinary times. Drugs such as Polygonum multiflorum Thunb and Bushen shampoo and dye hair to treat black hair, and the effect is OK. Hair transplantation is an ideal method to treat alopecia and alopecia areata. It usually takes about 3 months to grow some new hair.