Generally, vitiligo expands from person to person, most of them expand in 3 to 6 months, but there is no very clear time for individuals. Vitiligo in most cases is caused by problems with the immune system that lead to the development of vitiligo. Since everyone has a different body type and a different immune system, the chances of vitiligo expanding and the time it takes to do so are different. Some people develop white patches overnight, which can develop and increase in size quickly. Some people from the appearance of a small white spot for three months or even a year did not expand, but clinically most of the expansion in 3 to 6 months, these are indicative of vitiligo is not controllable, spreading and expanding without warning, belonging to the existence of instability. In the clinical diagnosis of vitiligo, usually in the doctor’s guidance to use some external drugs, such as tacrolimus ointment or halomethasone cream, etc., but also according to their own situation, with the use of 308nm excimer laser treatment. The specifics of the situation follow the doctor’s instructions for treatment.