The bowel site examination is not just a colonoscopy, but also includes abdominal imaging, laparoscopy, and pathogenetic testing. The details are as follows: 1. Enteroscopy: used for diarrhea, blood in stool of unknown cause or abnormal defecation, suspected chronic intestinal inflammatory diseases, such as chronic colitis, ulcerative colitis, rectal and sigmoid polyps, diverticula, tumors, and so on, as well as colon cancer to determine the scope of the lesion before the operation, colon cancer, polyps, post-surgical review and efficacy of the follow-up, etc.. 2. Abdominal imaging: ultrasound, CT, magnetic resonance can show thickened peritoneum, ascites, intra-abdominal mass and fistula. Abdominal X-ray film can be used to diagnose intestinal obstruction. Gastrointestinal X-ray barium meal examination can find intestinal adhesions, intestinal tuberculosis, intestinal fistula, intestinal cavity mass and so on. 3. Laparoscopy: it is suitable for those who have more ascites and have difficulties in diagnosis. Extensive peritoneal adhesions are prohibited. 4. Pathogenetic examination: fecal pathogenetic examination can be detected under the microscope to see whether there are red blood cells and pus cells, as well as macrophages, to rule out infectious colitis. Bowel site inspection is not just a colonoscopy, so in order to achieve the purpose of diagnosis and treatment, it is recommended to go to the hospital, under the guidance of the doctor to improve the relevant auxiliary examination, and then targeted treatment or treatment.