Stomach bloating may be caused by chronic gastritis, gastric ulcer or eating too much gas-producing food or improper eating habits. 1. Chronic gastritis: accompanied by epigastric pain, indigestion, etc., which can lead to bloating, mostly related to Helicobacter pylori infection, and can be diagnosed by C14 breath test. 2. Gastric ulcer: due to the increased secretion of gastric acid, abdominal pain and bloating, acid reflux, belching (hiccups) and other symptoms, usually diagnosed by gastroscopy. 3. Eating too much food with increased gas production: such as soybeans, white radish, yogurt, hawthorn, etc., which can also lead to abdominal pain and bloating and increased gas production. 4. Indigestion: Eating too much or decreased digestion and absorption capacity of the gastrointestinal tract may also lead to abdominal distension and abdominal pain. It is recommended that patients go to the hospital in time to improve the relevant examination, clear diagnosis and active treatment.