Gastroscopy examines the esophagus, stomach, and duodenum for lesions. Gastroscopy is unique in that a flexible tube with a camera device at the front is placed into the digestive tract through the mouth. During the examination, the surface of the mucosa of the esophagus, stomach and duodenum can be observed directly with the naked eye, and biopsy of the gastric mucosa can also be performed to clarify the nature of the disease, making it the preferred examination method for checking for upper gastrointestinal tract lesions. Through gastroscopy can check the severity of acute and chronic gastritis, whether there is atrophy and intestinal epithelial hyperplasia, identify the benign and malignant nature of ulcerative lesions, but also can observe submucosal swelling, blood vessels, etc., but also can determine the cause of upper gastrointestinal bleeding, find early gastric cancer. If the patient has stomach discomfort, it is recommended to go to the regular hospital in time, and if necessary, follow the doctor’s advice to choose gastroscopy, after clarifying the cause of the disease, and then carry out targeted treatment or treatment.