The accuracy of gastroscopy results after drinking is related to the time of preoperative drinking. If alcohol is consumed within 12 hours before gastroscopy, it may slow down gastric emptying and congestion of the gastric mucosa, resulting in lower diagnostic accuracy. Before gastroscopy, patients need to fast for at least 6 hours, and it is clinically recommended not to drink alcohol within 12 hours to avoid dehydration, slowed gastric emptying and intraoperative vomiting, etc. Slowed gastric emptying will lead to unclear endoscopic vision and affect endoscopic examination results. Excessive intake of alcohol will stimulate the gastric mucosa to become congested and swollen, making it difficult to observe the condition of the stomach clearly under the endoscopy, which may lead to gastric inflammation and other conditions being overlooked. If patients need to undergo gastroscopy, they should make preparations before the examination under the guidance of the doctor to facilitate the smooth progress of the examination and to avoid affecting the examination results.