Gastroscopy can clarify chronic non-atrophic gastritis. If the patient experiences vague pain or distension in the upper abdomen, such as below the xiphoid process or in the middle and upper abdomen. If this is accompanied by digestive symptoms such as acid reflux, belching, nausea and vomiting, burping, or even black stools, it is more likely that the patient has chronic non-atrophic gastritis. At this point, you can go to the hospital, usually the doctor will prescribe gastroscopy and other related tests for clarification. Chronic non-atrophic gastritis is usually seen under the gastroscope, mucosal erythema, hemorrhage, mucosal roughness, may or may not be accompanied by edema, congestion, oozing and other basic manifestations, and at the same time there may be erosion, bleeding or bile reflux and other signs. At the time of diagnosis, the disease is usually described as chronic non-atrophic gastritis with erosion and bile reflux. Clinically, the disease is usually mild and treatment is mainly anti-infective. When symptoms are present, the disease can be treated with acid-suppressing drugs, gastric motility-promoting drugs, gastric mucosa-protecting agents, such as omeprazole, rabeprazole, esomeprazole, and so on, in accordance with the doctor’s instructions. In addition, you can also take oral amoxicillin or clarithromycin under the guidance of the doctor and other combined treatment. Gastroscopy patients need to pay attention to, generally should be two days before the examination to try to avoid eating more difficult to digest food. Fasting 6-8 hours before the examination, 4 hours before the water ban, to avoid the presence of stomach contents on the examination caused by interference, affecting the results of the examination. Since the gastroscope is passed through the throat into the stomach, the patient may have a vomiting reaction, which is normal. After the gastroscope enters the body, the patient needs to keep the body in a static state to avoid damage to the internal organs due to activities, and also needs to pay attention not to do swallowing movements.