Stomach fever generally refers to a burning sensation in the stomach, which is common in gastroesophageal reflux disease (GERD), chronic gastritis, gastric ulcer and other diseases. 1. Gastroesophageal reflux disease (GERD): refers to the reflux of gastric acid into the esophagus causing heartburn and other symptoms. The main manifestation is burning sensation and reflux behind the sternum or under the raphe, which is often aggravated when bending over, lying down or increasing abdominal pressure, and it can lead to burning sensation in the stomach. 2. Chronic gastritis: chronic inflammation of the gastric mucosa. Most patients do not have obvious symptoms, but those who have symptoms can be manifested as discomfort in the upper and middle abdomen, burning pain, dull pain, fullness, etc., can also be manifested as loss of appetite, belching, acid reflux, nausea and other symptoms, which can also lead to heartburn. 3. Gastric ulcer: refers to the appearance of ulcers on the inner wall of the stomach. The main manifestation of periodic epigastric pain or discomfort, the nature of the pain can be dull pain, burning pain, distension, severe pain, hunger-like discomfort, mostly after eating, can be accompanied by abdominal distension, acid reflux, belching and other symptoms, which can also lead to burning sensation in the stomach. There are many other causes of heartburn, which should be emphasized, timely consultation, identification of the cause of the disease, and follow the doctor’s instructions for further treatment or therapy.