Flatulence for more than a month may be a physiological phenomenon, caused by bad habits, or a pathological phenomenon, such as gastritis, gastric ulcer or stomach tumors and other diseases. 1. Physiological phenomenon: bad eating habits, if there are bad habits such as eating too fast, talking during meals, etc., may swallow a lot of air into the stomach, thus causing symptoms of flatulence. Unhygienic diet, irregular lifestyle, drinking a lot of carbonated beverages, eating a lot of easy-to-gas or hard-to-digest food may also cause flatulence. 2. Pathological phenomenon: Stomach diseases will lead to weakening of peristaltic function of the stomach, resulting in slow emptying of the stomach, and it is difficult for the air inside the stomach to be absorbed and discharged, thus causing flatulence. In addition, when there is a tumor in the stomach, the tumor presses on the stomach wall or lumen, which leads to abdominal distension. (1) Gastritis: Gastritis is divided into acute gastritis and chronic gastritis, the causes of acute gastritis are often stress, alcohol, trauma and drugs, etc.; the causes of chronic gastritis are often Helicobacter pylori infection, autoimmunity and gastric reflux. Drugs are mainly chosen according to the symptoms, patients with bloating as the main symptom can use some gastrointestinal prokinetic drugs such as domperidone. (2) Acute gastric retention: The treatment of acute gastric retention can be divided into gastrointestinal decompression and symptomatic treatment. After gastrointestinal decompression and suctioning out the gastric contents, if the obstruction is caused by pyloric edema, some acid-suppressing drugs such as omeprazole can be used, and at the same time, the stomach should be washed with warm saline to promote the absorption of edema. If the obstruction is caused by fibrous scarring, surgery is needed. (3) Stomach tumor: stomach tumors are mainly caused by infection, environmental factors, bad dietary habits or hereditary factors. If physiological causes are ruled out, the patient should consult a doctor in time to clarify the specific causes, and if necessary, carry out appropriate treatment.