The causes of small stomach bloating mainly include organic lesions of the gastrointestinal tract, functional lesions, etc., which need to be combined with other symptoms, and the cause of the disease should be clarified after the corresponding examination. 1. Organic diseases of gastrointestinal tract: Acute and chronic enteritis, ulcerative colitis, peptic ulcer, intestinal tumors and other diseases can cause abdominal pain, bloating, nausea and other digestive symptoms. It is necessary to combine with the medical history, improve the abdominal ultrasound, gastroenteroscopy to clarify the specific causes of the disease, and give targeted drug or surgical treatment. 2. Functional diseases: mainly functional dyspepsia, intestinal flora imbalance, etc., which can be manifested as abdominal distension, decreased defecation, nausea, regurgitation, decreased food intake and other manifestations. Methods of treatment include a light diet and increased exercise. If necessary, the application of drugs to promote gastrointestinal peristalsis, such as mosapride, domperidone and so on, can be prescribed by the doctor. Flatulence can also be caused by hypothyroidism, liver and kidney failure, pelvic inflammatory disease and other diseases. Once the symptoms of small stomach flatulence exist for a long time, it is necessary to consult a doctor for examination, clarify the cause of the disease, and actively treat it without delay.