If the moss is white and the breath smells bad, you need to consider food stagnation (indigestion of food and its accumulation in the stomach), which corresponds to the need to eliminate food and resolve stagnation (digestion of stagnant food). In Chinese medicine, there is the theory of tongue diagnosis, which believes that the human tongue can react to changes in the internal organs and evil qi. A normal person’s tongue is thin and white, but if the tongue is white and thick, it suggests that there may be food stagnation or internal stagnation of dampness or phlegm (pathological products of impaired metabolism of water and fluid), and combined with bad breath, it is necessary to consider food stagnation, which is often experienced by overeating. Hawthorn, malt, Shenquan and other food eliminators can be used, together with Chenpi, Citrus aurantium, etc. to move qi and guide stagnation, and commonly used Chinese patent medicines include Da Shanzha Pill. Note that the diet should be light during the medication, avoiding alcohol and spicy, cold and oily food. It is not suitable to take tonic Chinese medicine at the same time. It is not suitable for people with weak spleen and stomach without stagnation and loss of appetite. It is recommended that people with bad breath and white tongue should go to the Chinese medicine department for diagnosis and treatment, so as to clarify the cause of the disease and treat the symptoms, and should not take medication on their own, so as to avoid delaying the condition.