The increasing number of gray hair on the head can be related to physiological phenomena as well as mental factors, vitiligo, the body of the microelement deficiency and other causes. 1. physiological phenomenon: old age gray hair may be a physiological phenomenon, in the early stage only a few white hair, with age, melanocytes gradually reduce, the ability to produce melanin reduced, gray hair can gradually increase. 2. mental factors: some neuropsychiatric disorders such as long-term sorrow, nervousness, excessive terror and so on, there can be a gradual increase in gray hair. 3. Vitiligo: Vitiligo skin can not only have white spots, local white spots on the hair will also be due to pigment loss gradually become white performance. 4. micronutrient deficiencies: studies have shown that B vitamin deficiencies may be associated with premature hair loss. Gradual increase of white hair on the head in addition to physiological factors, the rest of the situation can be consulted, in accordance with the doctor’s instructions standardized medication, and gradually improve the situation of white hair.