Gastric acid is hydrochloric acid continuously secreted by the cells in the stomach lining, and feeling acidic in the stomach means more hydrochloric acid is secreted in the stomach than normal; gastric distension means that the food in the stomach cannot advance normally to the duodenum and small intestine, resulting in the accumulation of food in the stomach and the feeling of gastric distension, while gastric acid and gastric distension are common in chronic gastritis, peptic ulcer, and gastrointestinal tract dysfunction, in addition to physiological factors. Some physiological factors can cause stomach acidity and bloating, common reasons include bad mood, irregular eating, etc., someone eating faster causing a lot of gas to be brought into the intestinal tract, a lot of food into the stomach to stimulate the wall cells to secrete a lot of stomach acid, etc., certain foods such as sweet potatoes, coarse grains, etc. will also stimulate the stomach to produce a lot of stomach acid and indigestible food, while bad mood can also cause gastrointestinal motility and digestive disorders. Such cases only need to adjust eating habits, maintain a happy mood can quickly recover and eliminate the feeling of stomach acidity and bloating. In addition to physiological factors, certain organic and functional diseases can also cause stomach acidity and bloating. Common organic diseases are chronic gastritis and peptic ulcer, which lead to incomplete digestion of food or excessive secretion of gastric acid, resulting in symptoms of acidity and bloating; common functional diseases are functional dyspepsia and irritable bowel syndrome, which need to be diagnosed and actively treated after completing relevant examinations. In summary, there are many reasons for the clinical symptoms of stomach acidity and bloating, which should not be underestimated and should be noticed and treated promptly.