Many people wish to understand what causes vitiligo to avoid this unpleasant problem. If the person has diabetes, his or her chances of facing this problem are much higher. The condition occurs as the body starts to lose the pigmentation. Initially, small pale dots with abnormal borders appear to expand quickly over time, especially when the individual interacts with the sun lights regularly. The zone under the risk is pretty high – more than 50% of the human body. In the end, it may look like the person is colored in two halves.