White tongue coating with cracks in the middle and teeth marks on the edge is related to the body’s spleen deficiency and dampness immersion or cold-dampness internalization, and the treatment can take medicines such as Radix Rehmanniae Pill. 1. Spleen deficiency and dampness immersion: the body’s spleen deficiency does not transport, resulting in water and dampness not being transformed, and water and dampness evaporate on the tongue along with the stomach qi, which can be seen as white and thick tongue moss; it fills up the tongue, cracks and teeth marks. It is also accompanied by shortness of breath, chest congestion, lack of desire to eat, diarrhea and loose stools (thin and unshaped feces), etc. For treatment, Ginseng Ling and Atractylodis Macrocephalae can be used to benefit qi and strengthen the spleen, and seep away dampness to stop diarrhea. 2. Cold and dampness: external dampness or cold and dampness, resulting in internal obstruction of dampness, which can be seen as white tongue with cracks and teeth marks, accompanied by fear of cold and cold limbs, heavy head and limbs sleepy, joint pain, abdominal pain and diarrhea, etc. The treatment can be used to warm the Yang and dissipate the cold and stop the diarrhea and pain. After the appearance of tongue abnormalities should be timely consultation, under the guidance of a professional physician to identify the evidence of treatment, in order to avoid causing damage to the body.