A white hair on the face may be due to the destruction and loss of melanocytes in the hair follicle, vitiligo and other reasons. 1. Hair follicle melanocyte destruction and loss: normally there are melanocytes in the hair follicle area, which can produce and synthesize melanin to ensure that the hair on the surface of the skin is black. When the follicle melanocytes are destroyed and missing, the facial hair will become white. 2. Vitiligo: a white hair on the face may be related to the disease, such as vitiligo in the early stage, affected by vitiligo body hair, skin, etc. will become white. A white hair on the face may be caused by a variety of factors, it is recommended to go to the regular hospital for a detailed examination to determine the cause, under the guidance of the doctor standardized treatment.