正常人的舌表面粘膜红润,有的小儿舌背上出现一个或几个大小不等的圆形或椭圆形红色斑块,表面光滑,边缘有2～3毫米宽的白色或黄色组织,形似地图,医学上称之为地图舌。地图舌是婴幼儿的常见病症。据有关资料报道,儿童发病率约为 Normal tongue surface mucosa rosy, and some children appear on the back of the tongue one or several round or oval red patches of varying sizes, the surface is smooth, the edge of 2 to 3 mm wide white or yellow tissue, the shape of the map , Medically called the map tongue. Map tongue is a common illness in infants and young children. According to the information reported, the incidence of children is about