Before doing gastroscopy, you should take bupivacaine hydrochloride oral solution for local anesthesia. There are many reasons for gastric distension, such as long-term bad dietary habits, often eat stimulating food will lead to gastric mucosal damage, causing acid reflux, belching and other manifestations, you can go to the hospital for a gastroscopy. Do general gastroscopy before the doctor will let the patient in advance to take drugs, mainly for the examination of the digestive tract before the local mucosal anesthesia drugs, generally use compound bupivacaine hydrochloride oral solution, before the examination through the taking of such drugs can play a role in anesthesia of the local mucosa, but also belongs to the local mucosal anesthetics, gastroscopy insertion to reduce the sensitivity of the patient’s throat, esophagus area, more convenient for gastroscopy into the same time, can also reduce the examination of patients appearing to the gastroscope, while It can also reduce the pain of the patient during the examination. The use of local anesthetics makes it easier for patients to accept and does not affect the results of gastroscopy.