Is there any usual ways to prevent vitiligo?

Condition analysis:
Even though the exact cause of vitiligo remains unknown, most experts believe that a combination of many factors contribute to the onset of the disease. Some of these factors are heredity, exposure to certain chemicals (phenol, catechol etc.), emotional/physical stress, autotoxic response, skin injuries, burns and inflammatory skin disorders. The condition may also be autoimmune in origin although the presence of autoantibodies has not been confirmed yet. It is also possible to develop vitiligo if one is already suffering from some medical conditions like diabetes, pernicious anemia, thyroid gland disorders, Addison's disease, uveitis and alopecia areata.

Instructions:
Vitiligo is not contagious and cannot be transmitted from one person to another. As far as prevention of the condition is concerned, any skin patch should be thoroughly examined. One should maintain good health and keep the immune system strong. Furthermore, it is essential to avoid application of any unproven topical medication on the skin, especially corticosteroids. Some say that even avoiding excess consumption of sour things can help.