Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Vitiligo ?
    ### Response:
    Vitiligo causes white patches on your skin. It can also affect your eyes, mouth, and nose. It occurs when the cells that give your skin its color are destroyed. No one knows what destroys them. It is more common in people with autoimmune diseases, and it might run in families.
    