The tongue coating is white, yellow and greasy with small red spots, which may be caused by dampness and heat. Dampness and heat mean that dampness obstructs the qi mechanism and keeps the evil heat inside and unable to dissipate outwardly. Due to the internal obstruction of dampness, so the tongue coating is thick and greasy; part of the dampness into heat, so the tongue coating is white with yellow; evil heat is stored in the internal, so there will be small red spots. It should be noted that the tongue coating is white and yellow and greasy with small red dots only suggests the nature of the disease of dampness curbing heat ambush, it can not suggest the location of the lesion. Dampness curbing heat ambush has different lesion sites, such as dampness curbing heat ambush in the upper jiao, spleen and stomach, membrane original, triple jiao, etc. So it is not enough to rely on the tongue image. Therefore, it is not enough to rely on the tongue, but also need to be combined with other symptoms, in order to have a more accurate judgment of the disease. If the body is not feeling well, you should go to the hospital in time to clarify the cause of the disease, do not do it yourself, so as not to delay the condition.