Gastroscopy is a relatively accurate and generally safe method of examination. However, gastroscopy is an invasive examination, and the examination process rubs the throat, so if you have laryngitis, the examination will induce some discomfort, so the doctor will only recommend gastroscopy when it is necessary. With the development and continuous improvement of gastroscopy technology, as long as it is done properly, it usually does not cause much harm, so don’t worry too much. However, during gastroscopy, especially when the gastric tube enters the throat, it is easy to cause nausea, dry vomiting, pain and other symptoms, some patients also feel particularly uncomfortable, the more nervous vomiting is likely to appear mucosal abrasions. Vigorous vomiting can also cause tearing of the cardia mucosa and even bleeding. This is also a disadvantage of gastroscopy. There is also the process of doing a biopsy, which can cause a small amount of bleeding in the stomach. If there are serious pre-existing lesions, gas injection during gastroscopy can lead to perforation. With the development of medical technology, painless gastroscopy and capsule endoscopy are widely used, which are not only more accurate and basically painless, but more expensive, so patients can choose the examination equipment that matches their needs with their own situation. Although gastroscopy can cause some damage, but the examination should still be examined, only with good cooperation with the doctor, in order to return to a healthy body.