The common causes of white spots on the face are: 1. If white spots appear on the face of children, consider the roundworm spots caused by worms in the intestine. It is recommended to take intestinal worm clearing tablets for treatment. 2, usually picky, partial food, do not pay attention to the vitamin and mineral supplement, the face will also appear white spots, mostly seen in childhood, it is recommended to timely supplement vitamins and trace elements. 3, sweat spots, also known as pityriasis, is caused by Malassezia infection, manifested as light brown skin spots or gray spots, the surface has very thin scales off. If you use terbinafine hydrochloride gel or ketoconazole cream topically to apply. 4, facial skin if often exposed to chemicals, or long-term exposure to the sun, affecting the formation of normal melanin in the skin, may also appear skin white spots, avoid common contact with chemicals, avoid prolonged exposure to the sun.