Gastroenteroscopy is an examination of the digestive tract using a gastroscope and an enteroscope through the digestive tract, with the gastroscope being performed through the mouth and the enteroscope being performed through the anus. Gastroenteroscopy is a commonly used examination of the digestive system and is divided into gastroscopy and enteroscopy, which mainly examines the mucosa of the digestive tract for inflammation, polyps, ulcers, and tumors. Gastroscopy is the endoscopic probe from the mouth into the esophagus, through the esophagus, stomach, to reach the duodenum descending, in the slow withdrawal of the naked eye to see any abnormalities, the examination should be fasting for 6 to 8 hours before the examination, the night before a semi-liquid diet. Enteroscopy is the endoscopic probe from the anus into the intestines, through the intestine, to reach the end of the ileum, in the slow exit with the naked eye to see any abnormalities, before the examination need to carry out intestinal cleansing. If there is any discomfort during gastroscopy and enteroscopy, inform the doctor in time, and the doctor will deal with it in time to avoid adverse consequences.