Gastroscopy is generally painless and nowadays painless gastroscopy is mostly used, which can greatly reduce the discomfort of the patient during the operation. During gastroscopy, a hose needs to be inserted into the throat and the patient needs to breathe vigorously during the insertion of the hose to avoid abrasion of the throat. If a normal gastroscopy is performed, nausea and vomiting may be experienced at this time. Patients who are overly nervous or fearful can choose to have a painless gastroscopy, where the patient is asleep during the examination and will not feel any discomfort. Gastroscopy, as long as you choose to go to a regular hospital, you can generally trust the skills of the doctor and will not be particularly uncomfortable. Patients can further reduce the discomfort by actively cooperating with the doctor during the gastroscopy or by thinking of other things to distract themselves. No food or strenuous exercise for 12 hours before the gastroscopy, and avoid smoking to avoid irritating the throat area and aggravating the discomfort, and the test results will be more accurate.