Blood in stool after radiotherapy for endometrial cancer is not a normal phenomenon, which is mainly caused by the damage of intestinal mucous membrane, and it needs to be judged comprehensively with the bleeding condition. In the process of radiotherapy for endometrial cancer, it will cause damage to the adjacent rectum, resulting in edema, fragility and bleeding of rectal mucous membrane, and some patients will have fibrosis of intestinal wall afterwards, which will affect bowel movement, and some of the effects are irreversible, so the corresponding condition is not a normal phenomenon. If blood and stool appear in the course of radiotherapy for endometrial cancer, it is necessary to observe the size of bleeding, a small amount of bleeding is not a big problem, but if the bleeding is big and accompanied by obvious abnormality of defecation, it is necessary to stop the treatment, and carry out standardized treatment under the guidance of doctor.