It takes about 10-20 minutes to perform a painless gastroscopy, which can be used to confirm the diagnosis of gastric diseases. Since gastroscopy is an invasive examination, many people cannot tolerate the discomfort caused by the examination process, and painless gastroscopy can be chosen for this situation. Painless gastroscopy takes about 10 minutes and involves a detailed examination of the color and nature of the gastric mucosa as well as the presence of abnormal hyperplasia on the mucosa. Painless gastroscopy has less impact on the patient, so it will not hinder the examination, and therefore the time is relatively short. However, some people will find abnormal hyperplasia during gastroscopy, and biopsy should be taken for pathological examination to understand the nature of the disease. Some people will have gastric polyps, which can also be removed by endoscopic surgery at the same time as the gastroscopy, so it will have some impact on the examination time, and the examination time for these people is longer, taking about 20 minutes.