The reason for abdominal distension without food is that although the patient has not eaten, the digestive system will still work normally, and the bacteria located in the intestines are unable to break down the food residue, but they will produce a large amount of gas, which will stimulate the intestinal wall and cause abdominal distension and pain symptoms. At the same time, the stomach will also secrete gastric acid, which stimulates the gastrointestinal mucosa and causes gastrointestinal pain, and at the same time, the chemical reaction with the alkaline intestinal fluid in the intestinal tract will also aggravate the symptoms of abdominal distension. This shows that not eating on time will have an adverse effect on gastrointestinal function, and in serious cases, gastritis, gastric ulcer and duodenal ulcer can occur. When abdominal distension occurs, you can choose to take oral medication such as hepatic and gastric pain relief tablets, which can quickly alleviate the symptoms of abdominal distension.