Gastric pain after gastroscopy may be due to the normal reaction of gastric distension caused by the examination process, or it may be caused by gastric mucous membrane damage. 1. Flatulence: During gastroscopy, in order to conduct a thorough examination, the stomach is usually pumped or filled with water. Therefore, it may cause gastric distension and discomfort, and eating after gastroscopy may aggravate the distension phenomenon, which may cause gastric pain. This is a normal post-gastroscopy phenomenon, which can be relieved after resting and exhausting. 2. Gastric mucosa damage: in the process of gastroscopy, the endoscope needs to be sent into the stomach, at this time, if the doctor’s technology is not up to standard or the patient does not cooperate, the gastroscope may scratch the gastric mucosa, resulting in gastric mucosa damage. When eating, the food will stimulate the wound and cause pain. To summarize, stomach pain after gastroscopy may be caused by different circumstances, if the pain is serious, it is recommended that the patient go to the hospital in a timely manner in order to clarify the specific causes.