汗斑又名花斑癣,致病菌为糠秕小芽胞菌。主要病变部位为躯干部,初起损害为黄豆大小的圆形斑疹,浅黄至深褐色,表面覆有极薄的糠样鳞屑,轻刮时鳞屑较明显;继而发展损害可互相融合成大片形状不整或弥漫性褐红色或浅黄色鳞状屑斑,有针刺样的痒感;有时还可产生丘疹或水疱。除躯干外,液窝、 Khan, also known as Pityriasis versicolor, pathogenic bacteria for the small cell Bacillus. The main lesion for the trunk, the initial damage to the size of the round-shaped soybean yellow spot, light yellow to dark brown, the surface covered with very thin bran-like scales, light scrape when the scales more obvious; then the development of damage can be merged into each other into large pieces Irregular or diffuse maroon or light yellow scaly, acne-like itchiness; pimples or blisters can sometimes develop. In addition to trunk, liquid litter,