Vitiligo is an acquired destruction of melanocytes resulting in white patches on the skin. Vitiligo may occur at any age, though about 50% present before the age of 20. The patches are completely de-pigmented and appear totally white. It may occur anywhere on the body, including around the mouth, nose and eyes. It may also occur on the elbows, knees, front of the shins, back of the hands and feet.