Symptoms of flatulence are mainly characterized by abdominal distension, belching, nausea and even vomiting, and in some patients, signs of acute peritonitis such as abdominal pain and elevated body temperature. Flatulence, first, because of increased gas production in the gastrointestinal tract, and second, the intestinal gas can not be discharged. With the gradual collection of gas in the gastrointestinal tract, the gastrointestinal tract dilates while the abdominal cavity has a limited volume, which is manifested as abdominal distension and belching in the early stage, and with further increase of gas, the gas enters into the stomach and esophagus, and the symptoms of nausea and vomiting will appear. With the increase of gas, the pressure in the intestinal lumen further increases and symptoms of abdominal pain will appear. The dilatation of the intestinal lumen will lead to the displacement of the flora, resulting in abdominal infection and acute peritonitis, which will also aggravate the symptoms of abdominal pain. Therefore, when symptoms of flatulence occur, it is necessary to consult a doctor in time to clarify the cause of the disease and avoid delaying treatment.