Colonoscopy gastroscopy can be done together, and usually has no effect. Gastroscopy is a procedure in which the tube of the gastroscope is inserted through the mouth into the esophagus, stomach, and duodenum to examine lesions in the mucosa of the esophagus, stomach, and duodenum. Enteroscopy is a procedure in which the body of the enteroscope is inserted through the anus into the rectum and colon to examine lesions in the mucosa of the intestines. Gastroenteroscopy can be done together, preferably under anesthesia, with one anesthesia to complete both the colonoscopy and gastroscopy at the same time. However, it should be noted that patients with high blood pressure, heart disease, gastrointestinal bleeding and perforation should be carefully selected, so as not to aggravate the patient’s own disease, causing respiratory distress, fainting, gastrointestinal hemorrhage, peritonitis and other conditions to occur. Gastroenteroscopy can also be done together without anesthesia, but attention should be paid to the patient’s tolerance, because gastroscopy can cause nausea, vomiting and other symptoms, and enteroscopy can cause abdominal distension, abdominal pain and other reactions. It is recommended that patients seek medical attention in a timely manner and make the choice of examination program under the guidance of the doctor.