Vitiligo is a condition in which white patches develop on the skin. Vitiligo is caused by a loss of pigment in the skin, due to destruction of pigment-forming cells called melanocytes. The exact cause of the destruction of these cells is not known. One possible explanation might be that the body's immune system destroys the cells, as in other autoimmune conditions. There is no known way to prevent or cure vitiligo. However, several methods can be used to improve the appearance of skin severely affected by vitiligo. Follow the links below to find WebMD's comprehensive coverage about vitiligo, what it looks like, how to treat it, and much more.