Abdominal distension usually occurs because of disorders of the gastrointestinal tract function, and the abdominal gas or even liquid produced can appear after accumulation inside the intestines. The specific reasons are: 1, the gastrointestinal tract function is not good, even gastritis, enteritis, constipation, etc. can cause gastrointestinal tract function distension; 2, for some other diseases caused by the stomach distension, such as pancreatitis, cholecystitis, gallstones, appendicitis, etc., can also appear stomach distension; 3, the gastrointestinal tract power disorder, or intestinal peristalsis disorder, intestinal muscle power disorder after the gas The gas cannot be discharged towards the bottom, resulting in the manifestation of distension in the abdomen.