When passing bright red blood, it is important to be clear whether the bleeding is in the urine or in the stool. If it is to relieve the urine when found in the urine red bloody things, is blood in the urine. If there is blood in the stool, it is bleeding in the stool, bleeding in the stool if it is first defecation and then bleeding, usually bleeding hemorrhoids, but also a small number of people may be the sigmoid colon, rectal bleeding, the cause may be inflammation, ulcers, polyps, tumors and so on. Therefore, further examination of urine routine, stool routine and coagulation test, and some need further examination of colonoscopy to rule out colorectal disease.