1, easily delayed blood in the stool Blood in the stool is a very common symptom, when found should neither be nervous panic, nor relaxed vigilance, when there is blood in the stool, should immediately go to the regular hospital professional department to identify and exclude is hemorrhoids, is colorectal polyps, or rectal cancer, so as not to cause misdiagnosis, missed diagnosis, delay the best treatment period. There are many people who are very careless about blood in stool, and often see patients who have blood in stool for a long time at work, but always think they are hemorrhoids, and when the diagnosis is finally clear, it has been delayed for a long time. Many people are influenced by “nine hemorrhoids out of ten” and think that anal bleeding and blood in stool is hemorrhoid, which causes many rectal cancers to be in the middle and late stage when diagnosed. For patients with blood in stool, the most important thing is to find the cause of the disease, and the most common means are anal finger diagnosis and endoscopy. Anal finger diagnosis: the doctor wears sterilized gloves on the right hand, applies liquid paraffin oil to the index finger and the outside of the patient’s anus for lubrication, and uses one finger to reach into the patient’s anus for palpation, which is a simple and easy but very important clinical examination method to check rectal and anal canal diseases, and is also the most basic examination that doctors have to do for patients with blood in stool. Endoscopy includes anoscopy, rigid or bendable sigmoidoscopy, and colonoscopy. Anoscopy can examine the rectum and anal canal about 10 cm from the anus, sigmoidoscopy can examine the rectum and distal sigmoid colon within 30 cm from the anus, and colonoscopy can examine the entire colon and even part of the distal small intestine. 3.Is colonoscopy uncomfortable? What preparation is needed? Most people can tolerate colonoscopy, but the doctor will have a basic assessment of whether the patient can tolerate colonoscopy, and some conditions are contraindications to colonoscopy. A colonoscopy is a test that must be booked. Before the test, a bowel cleanse is performed, and each hospital has a different method, so be sure to ask the nurse about this when you book your appointment. When you make an appointment, the nurse will also give you a sheet of paper with precautions to remember to read. Nowadays, painless colonoscopies are also available, and an anesthesiologist will give medication to put the patient to sleep before the examination. It is best to have a family member with you for a painless colonoscopy.