The tongue, with a surface covered with mucosal tissue and an interior composed of transverse muscles, has physiological functions such as expression of speech, mastication and swallowing. There are four kinds of papillae distributed on the surface of the tongue; filiform papillae, fungiform papillae, contour papillae, and lobular papillae. The respective papillae have taste, touch function, Chinese medicine said tongue for the heart of the seedling, but also for the spleen outside the candidate. Human organs, meridians, blood, gas, fluid changes, can be reflected in the tongue. Tongue moss is the moss attached to the tongue. Under normal circumstances, due to chewing and swallowing movements and saliva, diet rinse, can often remove the material between the papillae, which is the self-cleaning role of the tongue. The normal tongue coating of children should be thin white, dry and wet moderate, infancy see milky white moss as well as newborns red tongue without moss are normal phenomena. 1, if the child’s tongue coating thin white more wet, is due to eating too much cold food or cold after eating, the child’s appetite will be significantly reduced. 2, if the pediatric white thick moss, is eating too much, to be or eating interval is too short. In addition, children eat too much sweet food will also appear white thick moss. 3, if the child appears yellow thick tongue, mostly eat too full or eat indigestible food, food in the stomach stays too long, increasing the burden on the stomach, suggesting indigestion. 4, if the child appears to peel off the moss (also known as map tongue), most of the children’s digestive disorders, nutrient absorption disorders. However, when looking at the tongue to exclude some interfering factors…. To be viewed in natural light, lighting may see wrong. Such as the yellow moss will be seen as white moss. Also pay attention to the influence of diet, after drinking water can make the tongue wet, eat too hot or stimulating food to make the tongue deepen the color, eat oranges, riboflavin can make the tongue yellow, eat umeboshi, olives and so on can make the tongue black, due to the friction of eating can make the tongue thinner and so on.