Gastrointestinal distension can generally be caused by improper diet, emotional disorders and other physiological reasons, but also seen in some diseases, such as gastritis, gastric ulcer, intestinal obstruction, etc., need to seek medical treatment according to the condition. 1, physiological reasons 1, emotional factors: emotional tension or anger can make the sympathetic nerve excitation, causing gastrointestinal mucosa microcirculation disorders, ischemia, reduced mucus secretion, etc., stimulating increased secretion of gastric acid, damage to blood vessels and mucosa, so there can be intestinal distension and pain; 2, dietary factors: irregular diet, overeating, eating too fast or eating more gas-producing food, such as soy products, milk, high-protein foods, etc., as well as frequent consumption of spicy and irritating food. As well as frequent consumption of spicy and irritating food or smoking, drinking alcohol, etc., may lead to intestinal distension and pain. Pathological causes 1, stomach diseases: gastritis, gastric ulcer, gastric distention and gastric cancer can cause symptoms of intestinal distension, gastritis is associated with nausea, vomiting and poor appetite, gastric ulcer can cause acid reflux and burning sensation in the stomach, gastric distention can be accompanied by burping and belching, gastric cancer early symptoms are similar to gastritis, and late symptoms such as vomiting blood and black stool can occur; 2, intestinal obstruction: if suffering from intestinal obstruction can lead to the decrease of gastrointestinal peristaltic function, so that patients can accumulate a large amount of stool or gas in their bodies, which cannot be discharged in time, which can also lead to intestinal distension and pain; 3, other: some diseases other than gastrointestinal tract, such as liver, gallbladder, pancreas, peritoneum and other parts of the disease may also lead to intestinal distension and pain, which need to be treated symptomatically after perfecting relevant examination.