Ordinary gastroscopy takes about 10 minutes, the exact length of time varies from person to person. The whole process of ordinary gastroscopy is roughly as follows: preoperative preparation, local anesthesia preparation, formal examination, postoperative observation. 1. Preoperative preparation: patients need to fast for 8 hours, 4 hours of water, and at the same time need to measure the patient’s blood pressure, greater than 140/90mmHg people do not do ordinary gastroscopy, greater than 160/100mmHg people do not do painless gastroscopy. In addition, it is also necessary to talk with the patient to make him/her relax. 2. Preparation for local anesthesia: take local anesthetics orally, this drug has the dual effect of local anesthesia and expectorant foam, and after drinking it, it reduces the throat irritation reaction. 3. Formal examination: throughout the examination process, the patient may appear nausea, dry heaving and other discomfort, this is inevitable, the patient’s whole body muscles should be relaxed, do not tense, especially the voice. At this time, the patient should apply the nose for deep inhalation, slow exhalation, after a few minutes, the examination can be completed. 4. Postoperative observation: ask the patient whether there is abdominal pain, abdominal distension, sore throat and so on, the patient is not uncomfortable after the operation before being able to enter the food and water. Gastroscopy is the most intuitive and effective way of examining gastric diseases, with the advantages of visualization, clear diagnosis, and detection of early lesions.