Gastroscopy application of local anesthesia drug effect time 30 ~ 60 minutes, so in order to avoid choking, gastroscopy can drink water 1 hour after the examination. If there is a biopsy, endoscopic treatment such as polypectomy, endoscopic mucosal resection, etc., according to the size of the wound bleeding situation, follow the doctor’s instructions to decide the time to drink, eat. Doing gastroscopy process may cause irritation to the esophagus and the mucosa of the stomach, will produce local damage, and do gastroscopy generally need to use anesthesia, the effect of the drug usually takes 30 to 60 minutes to subside, so generally have to be one hour before you can drink water, if you drink water too early, there may be choking and coughing, pain, as well as nausea and bloating and other uncomfortable symptoms. One day after gastroscopy, it is recommended to eat a liquid diet, you can choose to eat millet porridge and soft noodles, etc. Avoid eating greasy and spicy food, so as not to stimulate the esophagus and the mucosa of the stomach, resulting in discomfort and affecting the recovery. After the gastroscopy also pay attention to observe the recovery situation, if there is any abnormality, such as severe abdominal pain or black stools, etc., it is recommended to go to the hospital in time to do the examination, to clarify what the cause is, and targeted treatment.