Ping Stomach San is composed of Atractylodes macrocephala, Atractylodes macrocephala, Pericarpium Citri Reticulatae and Licorice. Flat Stomach San is an expectorant of dampness, composed of Atractylodes macrocephala, Atractylodes macrocephala, Pericarpium Citri Reticulatae and Licorice. It has the effects of drying dampness and transporting the spleen, moving qi and harmonizing the stomach (regulating the stomach and internal organs by promoting the operation of qi). It is used for treating dampness stagnation in the spleen and stomach, with symptoms such as fullness in the epigastrium (abdomen), lack of appetite, tastelessness in the mouth, nausea and vomiting, belching (hiccups), acid swallowing (swallowing of acid in the stomach upward to the oropharynx), heaviness of the limbs, laziness and lethargy, frequent self-liberation, and a white, greasy, and thick tongue, with a slow pulse, and other symptoms. The adverse reactions and contraindications of Ping Gastric San are not clear. It should be noted that it is not suitable for people with weak spleen and stomach. If you need to use medication, please under the identification of traditional Chinese medicine practitioners, combined with their own situation reasonable choice, not to take on their own, so as not to delay the condition.