Gastroscopy is also available for healthy people. Gastroscopy is able to visualize lesions in the oropharynx, stomach, esophagus and duodenum, and it is also able to diagnose diseases by performing pathological biopsy on suspected lesions, which can help to detect esophageal cancer, gastric cancer and other diseases at an early stage; therefore, healthy people can also undergo gastroscopy on a regular basis, especially for those who have a family history of esophageal cancer, gastric cancer and other diseases, which will help to find out if there are any lesions in the early stage. Usually, healthy people older than 40 years old are generally recommended to have a gastroscopy every 3~5 years. Healthy people who need to undergo gastroscopy should actively cooperate with the doctor’s procedure.