The causes of acid reflux include the following: First, poor dietary habits, the usual intake of a large amount of acidic substances easily cause excessive secretion of gastric acid, or after eating and drinking without sufficient exercise to promote intestinal peristalsis, or even immediately lying down, can cause the phenomenon of reflux of gastric contents and acid into the esophagus. Second, the existence of gastrointestinal diseases, including esophagitis and chronic gastritis, duodenal ulcer, gastric ulcer, etc., these lesions are likely to cause the phenomenon of reflux of stomach acid. The indigestion and gastrointestinal peristalsis is too slow, which will cause a large amount of food can not be completely decomposed, and the food will stay in the stomach and intestines for a long time, thus easily causing the phenomenon of acid reflux.