Sweat patches, or florid furuncles, do not turn into vitiligo. The florid chafing is a superficial infection caused by Malassezia violating the cuticle of the skin; vitiligo is a common acquired depigmentation of the skin and mucous membrane disease. The two etiology, clinical manifestations, diagnosis are different. 1. etiology: florid chafing is mostly related to high temperature and humidity, fat and sweat, malnutrition, chronic diseases and the application of glucocorticoids. Vitiligo etiology may be autoimmune, oxidative stress, melanocyte self-destruction, heredity and so on. 2. Clinical manifestations: florid chaffing is prevalent in male young adults, mostly in the face and neck, forehead, shoulders and back, upper arms, armpits and other sebaceous gland-rich parts. The lesions of the pores as the center, the border is clear point-like rash, can increase to the size of the nail cap, the surface has chaffy scales, occasional itching, there is a certain degree of contagious. Vitiligo is common in children or young adults, exposure, friction and folds of the skin is common, the typical lesions for milky white or porcelain white pigmentation loss spots, the progression of short-term itching. 3. Diagnosis: florid chaffing can be examined by direct microscopic examination of the scales of the lesions. Vitiligo can be clear through the wood lamp, skin imaging, histopathology, laboratory tests. To summarize, pityriasis versicolor and vitiligo are two diseases with completely different mechanisms and cannot be converted to each other. If you have the problem of florid furosemide and vitiligo, it is recommended to go to the hospital in time and be treated under the guidance of the doctor.