Vitiligo is a condition in which white patches develop on the skin. Any location on the body can be affected and most people with vitiligo have white patches on many areas of the body.
Melanin is the pigment that gives the skin its characteristic color. Vitiligo is caused by a loss of pigment in the skin, due to destruction of pigment-forming cells known as 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. Although vitiligo affects all races equally, it is more noticeable in dark-skinned people.
Note: We are giving only a brief description of each disease for your quick reference with some best related photographs where needed.