China has always had the saying “nine out of ten hemorrhoids”, hemorrhoid disease is relatively common, but we can not stick all the blood in the stool to a hemorrhoid disease, to ask more questions why, so as not to cover up the real disease. Clinically, there are many reasons that can cause blood in the stool, and in a nutshell, they can be broadly divided into intestinal and extraintestinal causes. Intestinal causes include diseases of the intestine itself, such as inflammation, ulcer, ischemia, tumor, etc., such as acute and chronic bacterial dysentery, amoebic dysentery, acute enteritis, ischemic colitis, colonic ulcer, ulcerative colitis, colonic tuberculosis, Crohn’s disease, intestinal obstruction, intestinal necrosis, tumor of the colon, etc.; extraintestinal causes include systemic lesions in the intestinal response, such as allergic purpura, coagulation Therefore, we should pay special attention to patients with blood in the stool and ask them about the blood in the stool, the accompanying symptoms, previous blood in the stool and treatment, any bleeding from the skin, weight loss, etc. We should conduct relevant examinations and do not easily think that it is hemorrhoids, but at least perform an anal finger examination, because 80% of colon tumors are Therefore, a simple anal finger examination or proctoscopy can rule out many rectal tumor lesions to avoid misdiagnosis. Over the years, with the popularization of colonoscopy, many early cancer patients were found, and even some polyps were found to be half normal and the other half cancerous, and many pre-cancerous lesions, such as polyps, were found, especially lesions reported as villous adenomas or tubular adenomas, which may develop into cancer. These “adenomas” may develop into cancer and should not be ignored. Some pathology reports are grade 1 or 2 tubular adenomas, which should be taken more seriously because grade 1 or 2 medically represents mild heterogeneous hyperplasia or moderate heterogeneous hyperplasia, which is more likely to be cancerous and should be reviewed regularly by colonoscopy. Some people may think that the polyps have been removed during the last colonoscopy and there will not be any problem. In fact, due to the genetic reasons of the patient or the same intestinal environment, new polyps will grow in the original part of the polyps or elsewhere, so it is highly recommended that men over 40 years old or women over 45 years old, especially those who have a family history of gastrointestinal tumors, must have a colonoscopy as soon as possible to have a disease The first thing you need to do is to get a colonoscopy as soon as possible, so that you can treat the disease early and prevent it early, so as not to become a serious disease, and then it will be too late to regret.