Thick white tongue coating at the root like tofu dregs indicates that phlegm and turbidity are embedded within the tongue and the disease is in the lower Jiao (the lower abdominal cavity from the mouth of the lower stomach to the part of the second yin). Medicines to resolve phlegm and dispel dampness (dissolve phlegm and dispel dampness) may be considered, but it is necessary to identify the symptoms and select the prescription. Loose, coarse and thick moss particles resembling tofu dregs accumulating on the tongue surface are known as rotting moss, suggesting phlegm turbidity (phlegm evil and turbid qi) and food accumulation (undigested food and drink), which belongs to the problems of the spleen and stomach in the middle jiao. When rotting moss is at the root of the tongue, the root of the tongue corresponds to the site of the disease in the lower Jiao. The combination of the texture of the moss and the location of the moss suggests that phlegm and turbidity are embedded in the spleen and stomach, and that the disease has reached the lower burner. Treatment needs to strengthen the spleen, resolve phlegm and dispel dampness (to strengthen the spleen to resolve phlegm and get rid of dampness), and to take care of the kidneys. Commonly used medicines for strengthening the spleen, eliminating phlegm and dispelling dampness include Chen Pi, Ze Xie, Cang Zhu and Coix Seed, etc. Commonly used Chinese medicine formulas include Er Chen Tang, Warm Gallbladder Tang, Zhen Wu Tang and Wu Ling San. As the disease is in the lower jiao, it can also be combined with some drugs that enter the kidney meridian to resolve phlegm and dispel dampness, such as hemixia, cuscuta, poria, etc. The specific formula should also be combined with other diseases. Specific prescriptions need to be combined with other diseases, and it is recommended to go to the Chinese medicine department in time, and choose appropriate prescriptions for treatment after diagnosis.