You can choose to have anesthesia or no anesthesia during gastroscopy, the decision lies with the patient. The anesthetic solves not the pain caused by gastroscopy, but the vomiting caused by gastroscopy! Because gastroscopy does not poet pain, but will cause a person to vomit. Nowadays, many people sober up or induce vomiting by putting something down their throat, which causes the esophagus and stomach to contract, leading to spontaneous vomiting. And when you have a gastroscopy, the doctor needs to shove a nearly one-meter tube into your stomach, and the diameter of the tube is at least 1 centimeter, so think about that feeling!
People who have something in their stomach usually need to be anesthetized, because the doctor needs to prevent you from vomiting something out during the gastroscopy. Some people are an anesthesia-na?ve person, in which case even anesthesia won't help because he's not anesthetized. Some people are allergic to anesthesia, this kind of person is also not suitable for anesthesia. If you are anesthetized for gastroscopy, you will not vomit because your esophagus has been paralyzed. But you can try it without anesthesia if you can resist the medical equipment churning in your stomach (honestly, it's a feeling worse than death).
The fact that anesthesia reduces pain is obvious. Why would anyone choose anesthesia, obviously, is because it reduces medical pain, just like painless childbirth, at least you don't have pain at the moment of birth. The anesthesia used in the gastroscopy will not cause a wound, so after the gastroscopy, your body will slowly regain consciousness and there will be no other strange feeling, waiting for the anesthesia to be excreted in your body.
Based on my personal experience, I would suggest that if you need to do a gastroscopy, you should choose the one with anesthesia. First of all, without anesthesia, the insertion of the gastroscopy equipment into your throat may be too much for your body to handle. Second, if you keep vomiting, that smell will reach the doctor, who can't stand the smell will spend less time observing, and you won't get a fuller analysis.