Reflux gastroesophageal disease in the gastroscope has three manifestations: 1, there is no visible erosion or ulceration, the inflammatory response is also very light, this part of the most people, gastroscopy report does not mention esophagitis, but chronic superficial gastritis. Doctors call “non-erosive gastroesophagitis”; 2, gastroscopy can be seen in the esophagus obviously have erosions or even ulcers, known as erosive esophagitis or esophageal ulcers; 3, gastroscopy can be seen in the lower part of the esophagus esophagus part of the esophageal mucosa is replaced by the stomach’s mucosa, known as Barrett’s esophagus. These three conditions are collectively called reflux gastroesophageal disease. Only in the case of giant esophageal ulcer and Barrett’s esophagus with moderate-to-severe heterogeneous hyperplasia of the mucosa will the doctor consider that there is a chance of cancer, and the patient is advised to review the gastroscopy in a short period of time (usually 1-3 months). In general, Barrett’s esophagus without mucosal hyperplasia does not have a high chance of cancer, and only needs to be reviewed once a year, so there is no need to worry too much about frequent review of gastroscopy.