Vitiligo is an autoimmune disorder where your body attacks your own pigment cells. The pigment cells create melanin, the skin's pigment, which colors one's skin and protects against harmful UV rays. Without it, the skin may appear whiter or lighter in color. Vitiligo isn't harmful, but it can cause psychological stress on top of cosmetic insecurities. A dermatologist can help slow or even stop onset with certain medications, but restoring skin color is the complicated part. Consult a dermatologist to evaluate all your options.