Early stage bowel cancer patients may not have abdominal pain, because in the early stage of bowel cancer, the lesion is small, and the depth of invasion of intestinal tube is shallow, some patients may not have any symptom, and they just find it unintentionally when doing examination. Of course, some patients may have symptoms such as increased frequency of bowel movement, diarrhea, etc. Therefore, colonoscopy can find out the lesions in the middle of the intestinal tract of the patients, and the diagnosis can be further confirmed when pathological examination is done. After surgical treatment, according to the postoperative pathology, it can be judged whether the patient’s intestinal cancer is in the early stage or in the middle stage. Some patients may also manifest abdominal pain, such as hidden pain, distension, etc. As long as the patients have some uncomfortable clinical symptoms, it is recommended to go to the hospital for examination in time.