Sudden abdominal enlargement and bloating may be related to gastrointestinal flatulence, gastroesophageal reflux disease, etc., and it is recommended to pay attention to it in time. 1. Gastrointestinal flatulence: If the body in the daily diet or recent life in the gastrointestinal tract, blockage, the gas will be slowed down with the gastrointestinal peristalsis of the accumulation, resulting in flatulence, severe abdominal distension, abdominal enlargement. 2. Gastroesophageal Reflux Disease (GERD): Sudden abdominal enlargement and bloating may also be related to the presence of GERD, which is usually associated with overfeeding, excessive stomach acid and other reasons, which will slow down gastric dynamics, abdominal bloating, and in severe cases, will also cause heartburn and acid reflux. Sudden abdominal enlargement and bloating may also have other causes, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.