Long white hair may be due to the age of the normal phenomenon, may be due to mental stress and other factors lead to early gray hair, there may be due to vitiligo and other diseases lead to long white hair, different reasons, prevention or prevention of aggravation of the method is also different. 1. physiological factors: the older older people gradually began to grow white hair is a normal physiological phenomenon, this white hair often from both sides of the sideburns began to turn white, the beginning of a small amount of white hair, and then slowly increase, and gradually to the top of the head, this situation is not too good preventive methods. 2. early white hair: early white hair is the phenomenon of children and adolescents with white hair, may be related to heredity, autoimmune diseases, mental stress and other factors, this situation needs to let the patient to maintain a stable state of mind, appropriate relief stress to prevent the more long more white hair. 3. Vitiligo: Vitiligo is an acquired pigment loss skin mucosal disease, the disease can lead to patients with the phenomenon of long white hair, the disease in the prevention of exercise, regular diet, but also to avoid sunburn, burns, reduce excessive skin friction, the treatment of fluticasone propionate, tacrolimus ointment, carbotenoids ointment, and other medications for treatment. After eliminating physiological factors, if the symptoms of long white hair continue to be unrelieved, it is recommended to consult a doctor in time to find out the cause and ask the doctor to dispose of it. Medications should be used as prescribed by the doctor.