The causes of white spots on the belly are as follows: firstly, the possibility of vitiligo needs to be considered, but vitiligo mainly manifests itself as white spots with clear borders, and it is a porcelain white appearance; secondly, in addition to vitiligo, there is also the possibility of anaplastic nevus, which also manifests itself as flaky white patches on the skin, and it also manifests itself as clearer borders, but some anaplastic nevus borders are not very clear; and then, of course, there is also a kind of pigment loss spot that develops after inflammation. loss of pigmentation, such as lichen planus, which develops later to form a post-inflammatory loss of pigmentation; and finally, there is also the possibility of pemphigus, which is a hereditary white appearance of the skin. These possibilities need to be treated differently.