Please bring your medical records and relevant examination reports to the endoscopy room on time for colonoscopy. 1.For morning examination, the patient should eat easily digestible semi-liquid food at noon the day before the examination and fast at dinner, and fast at breakfast on the day of the examination; for afternoon examination, the patient should eat easily digestible semi-liquid at dinner the day before the examination and fast at breakfast and lunch on the day of the examination. 2, according to different conditions, take different intestinal irrigation solution, generally should be taken within 3-5 hours before the examination, when the stool is clear water-like indicates that the intestinal preparation is complete. 3, when the intestinal preparation process taking irrigation solution may appear bloating, abdominal pain, nausea, vomiting and other adverse reactions, the symptoms of mild slow down the taking speed, can relieve the symptoms; such as abdominal cramps, severe abdominal distension, anal no exhaust defecation and other symptoms should immediately terminate the intestinal irrigation and timely treatment to the hospital. 4, such as dizziness, panic, weakness, cold sweat and other hypoglycemic reactions, can take sugar water, chocolate, etc. 5.Please bring your own toilet paper and bread when you come to the hospital for colonoscopy, and it is recommended to have a family member accompany you. 6, if you have diabetes and need to be examined in advance, please take the initiative to tell the medical staff so that appropriate arrangements can be made; hypertensive patients can take antihypertensive drugs as usual on the day of examination and perform colonoscopy after the blood pressure has stabilized. Examination process: The patient should lie on the left side, and the colonoscope enters the body from the patient’s anus to examine the entire large intestine from the rectum to the cecum. The entire examination process takes 15-30 minutes, or longer for patients with special conditions or for colonoscopic treatment. During the examination process, sometimes the patient needs to cooperate, change the position and compression of the abdomen and other operations. Note after the examination: 1, some patients have abdominal pain, abdominal distension and other symptoms after the examination, do not need to be too nervous, can gently abdomen, slight walking, to be relieved after the anal exhaust. Rest for half an hour after the examination before leaving. 2, do biopsy or polyp removal treatment patients, there may be a small amount of blood in the stool after surgery, generally no special treatment, such as more bleeding or persistent abdominal pain should be promptly to the hospital; colonoscopy treatment after the general need to fast for 24 hours, if necessary, hospital observation treatment to avoid postoperative bleeding, perforation and other complications. 3. Patients should take the initiative to get the examination report and ask for the time of follow-up. Possible complications: intestinal bleeding, intestinal perforation, infection, cardiovascular and cerebrovascular accidents, etc.