The exact causes of vitiligo are unknown, but several possibilities are thought to be major contributors. Among these include an immune system dysfunction, certain viruses, stress, sunburn, injury, and exposure to certain chemicals. As mentioned, symptoms include the development of white patches of skin, often with reddish-brown boundaries. These white patches can appear on many areas of the body, including the forehead, eye area, lips, mouth, hands, arms, elbows, underarms, knees, feet, neck, and torso.
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