(1) Vitiligo: The skin can occur in any part of the whole body, but it is more likely to occur in exposed parts such as face, forearm extension, finger back, neck, waist and abdomen (belt), sacrococcygeal parts and so on. The most common parts of the face are the forehead, the inside of eyebrows, the junction between the nose root and the inside of cheeks, in front of and above the ears, including the hairline of the forehead, the brim of the hat and the redness of the lips. (2) The number of vitiligo: more or less, some patients have only one isolated vitiligo; Some have several or dozens of pieces all over their bodies. The area of vitiligo can be large or small, as small as soybeans, as large as the whole chest, abdomen or buttocks, and even vitiligo occupies most of the skin of the whole body. (3) Vitiligo shape: Vitiligo shapes vary in size, similar to round, oval or irregular shapes, and the number is uncertain. It can be a single skin lesion, but it is more common to have multiple skin lesions. Vitiligo can be divided into two shapes: one is round, including round, oval and quasi-round; First, it is not plastic, such as ground graphics and white clouds. Some vitiligo is bounded by the connecting line of the anterior superior spine of both bones, and the boundary on both sides is groin, which makes vitiligo an inverted triangle.