The graying of hair on the temples may be caused by physiological factors such as aging, mental stress, overwork, or by diseases such as vitiligo. 1. physiological factors: with age, or long-term in the state of mental tension and often feel physically tired, may lead to hair white sideburns. 2. Vitiligo: patients will be localized in different sizes, the number of white spots, can be seen in the whole body, if the head and face of vitiligo, may lead to hair white sideburns. The reason for this is mainly related to autoimmune diseases and genetic factors. The reason for the white hair on the temples is more, after excluding physiological factors, it is recommended to go to the regular hospital, clear cause.