People with vitiligo have no obvious precursors. It can appear in various parts of the body such as white patches and white hair in hairy areas 1. White spots. Vitiligo belongs to a kind of pigment loss skin and mucous membrane disease, any part can be involved, such as face, neck, hands, wrists, abdomen and other parts, or pubic area, anal mucosa, there can be a single, scattered or extensive white spots. 2. white hair on the hairy parts. Vitiligo lesions involved parts of the hair can become white hair. In addition the condition can be aggravated when the patient experiences exposure to the sun, fatigue, mental stress and other situations. When patients suffer from vitiligo, they should be actively treated under the guidance of doctors.