The stomach is always backing up, referring to belching (burping), which may be caused by improper diet, functional dyspepsia, chronic gastritis, peptic ulcer and other reasons. 1. Improper diet: Dietary preferences to eat some gas-producing foods, such as sweet potatoes, soy products, carbonated beverages, etc. will cause stomach bloating, so always belching. 2. Functional dyspepsia: gastric peristalsis is slow, the food in the stomach can not be emptied in time after fermentation with digestive juices gas production, so always belching, bloating, nausea and other symptoms. 3. Chronic gastritis: chronic inflammation of the gastric mucosa erosion affects the digestion of food, can cause bloating, belching, nausea, acid reflux and other symptoms. 4. Peptic ulcer: gastric mucosa protective barrier destruction of the presence of ulcer surfaces, digestive capacity is weak, so the bloating, belching, acid reflux, heartburn and other symptoms ah. It is recommended to consult a doctor in a timely manner to identify the cause of the disease and follow the doctor’s instructions for treatment.