There is no such thing as “why don’t you recommend gastroscopy at age 40”, which is unscientific and undesirable. Gastroscopy is mainly used to diagnose upper gastrointestinal diseases, through gastroscopy, you can determine whether there is a high probability of chronic gastritis, peptic ulcer and other diseases, people over the age of 40 are generally recommended to undergo gastroscopy. If there is a family history of stomach cancer, esophageal cancer, colorectal cancer and other diseases, it is even more important to actively undergo gastroscopy as well as other programs at the age of forty and above. Before gastroscopy, it is necessary to fast for 6 to 8 hours, and at the same time, it is necessary to carry out HbsAg, anti-HCV, anti-HIV and other tests, and at the same time, pay attention to the people who wear dentures to take out the dentures in time, so as not to cause unnecessary trouble to the examination. After gastroscopy, some people may experience discomfort, such as transient sore throat and foreign body sensation, which usually takes about two days to recover. It is recommended to consult a professional doctor in time when discomfort occurs, and carry out the examination of various items under the doctor’s guidance.