Stomach bloating and sudden enlargement may be caused by dietary factors, indigestion, intestinal obstruction, ascites formation and so on. 1. Dietary factors: due to eating too much gas-producing food, such as beans, onions, carbonated beverages, etc., resulting in digestion and decomposition of a large amount of gas, so that the stomach bloating stomach suddenly become larger. 2. Indigestion: due to poor eating habits, overeating and other gastrointestinal dysfunction, too much food accumulation, thus causing stomach bloating stomach suddenly become bigger. 3. Intestinal obstruction: If you suffer from intestinal obstruction, you can’t expel the intestinal contents out of the body in time, but you keep eating water and food, which may lead to stomach bloating and sudden enlargement of stomach. 4. Ascites formation: for patients with cirrhosis, or peritonitis, abdominal fluid may be formed, so the phenomenon of stomach distension and sudden enlargement of the stomach. The stomach bloating stomach suddenly become large should be timely to the hospital, clear cause, follow the doctor’s instructions standardized treatment.