When bowel cancer occurs, some patients will have pain in the stomach, and some patients will not have pain in the stomach. After the occurrence of bowel cancer, if the tumor is relatively small, the tumor will not lead to narrowing of the intestinal lumen, and the patient is able to defecate smoothly, at this time, it will not lead to pain in the stomach, and the patient will have clinical symptoms such as diarrhea and blood in stool. If the tumor is large, it will lead to narrowing of intestinal lumen. Once the intestinal lumen is narrowed, it will affect defecation and lead to intestinal obstruction, which will lead to pain in the stomach, usually bloating pain or cramping pain. After the occurrence of bowel cancer, early treatment is needed, if the cancer develops further, the tumor will spread or metastasize, the treatment effect is not good, the cure rate is relatively low, which will affect the survival time of patients.