Yellow tongue coating with teeth marks suggests that the organism has spleen deficiency and dampness, and dampness depresses and transforms into heat. Treatment is appropriate to clear heat, promote dampness and strengthen the spleen, which can be treated by identifying the symptoms and giving Chinese herbal tonics. Yellowish tongue coating is due to the evil heat incurring on the tongue. It suggests heat and internal evidence. Tooth marks on the edge of the tongue, formed when the tongue is fat and squeezed by the teeth, is due to the inability of the spleen to transport and transform water-dampness, resulting in the stagnation of water-dampness, suggesting the syndrome of spleen deficiency and dampness. Yellow tongue with teeth marks may be accompanied by distension and fullness in the epigastrium (abdomen), poor appetite, nausea and vomiting, bitter mouth and sticky mucus, loose stools (unformed stools with a feeling of not being drained afterward), short and yellow urine, heavy and sleepy limbs (limb weakness and heaviness), or heat in the body without elevation, and so on. Treatment should be clearing away heat, inducing dampness and strengthening the spleen. Through identification of symptoms, Er Chen Tang with additional subtraction can be given. If discomfort occurs, one should go to a regular hospital in time and be treated under the guidance of a professional physician to avoid delaying the condition.