Radiation-induced intestinal injury is generally irreversible, which means that the intestine is often already scarred or fibrotic, causing stenosis, which, together with the pressure of food after eating, often causes inflammatory edema at the stenosis, leading to or aggravating the occurrence of intestinal obstruction. Treatment: Due to the poor nutritional status at this time, surgical treatment is generally not considered for the time being. In the first step, after treatment by fasting and parenteral nutritional support, the inflammatory edema of the intestine is allowed to subside; in the second step, enteral nutrition is gradually restored via nasogastric tube, and at this time, the oral diet is still not available; in most people, after about 3 months of enteral nutritional support, the stricture of the intestine is somewhat relieved, and the oral diet can gradually be restored. If there is abdominal pain again after eating, surgical treatment can be considered, because the nutritional status has been improved at this time.