Flatulence may be caused by physiological factors and pathological factors (such as chronic gastritis and acute cholecystitis). 1. Physiological factors: prolonged sitting without exercise, peristalsis will slow down, the intestinal gas is not easy to expel from the body, so it will feel bloating. 2. Pathological factors (1) Chronic gastritis: chronic gastritis affects gastric motility, leading to slow gastric emptying and food retention, and food retained for a long time will ferment and produce excessive gas, causing abdominal distension. (2) Acute cholecystitis: the attack of acute cholecystitis leads to the secretion of bile, the number of intestines to reduce the digestive ability of the weakening of the gastrointestinal function of the peristalsis of the slow, resulting in abdominal distension. If the patient feels bloating, do not rule out that there are other causes, it is recommended to consult a doctor in a timely manner to identify the cause of the disease after targeted treatment.