Sweat patches, or florid furuncles, are punctate, scaly, and itchy. The symptoms are pitting rash with scaly and itchy. Furfurfur is a fungal infection caused by Malassezia violating the cuticle of the skin, and its cause is related to the infection of germs, heredity, environment and other factors. The clinical manifestation of maculopapular furuncle, which is commonly found on the neck and shoulders, chest and back, as well as the proximal part of the upper limbs, abdomen, etc., is a clear border of dotted rash, which then develops into flakes, and the surface is often covered with scales. The color of the skin lesions is brown, yellowish, white and reddish, etc. The patients usually have no conscious symptoms, and occasionally itchy. If the above symptoms occur, it is considered to be caused by maculopapular furuncle, and it is recommended that the patient go to a regular hospital for a relevant examination to determine the cause of the disease.