What causes vitiligo hair to turn white?

Want to know why vitiligo hair turns white, vitiligo is a common acquired limited or generalized skin depigmentation disease, due to the disappearance of skin melanin cell function, the cause and pathogenesis is still unclear, there are several theories that genetic theory, autoimmune theory, mental and neurochemical theory, melanocyte self-destruction, trace element deficiency theory, trauma, sunlight exposure and some photosensitive drugs can also induce vitiligo. It is recommended to go to the dermatology department of the regular hospital for examination and treatment.