Food reflux into the mouth after meals may be caused by excessive food intake, gastroesophageal reflux, and gastrointestinal dysfunction. 1, excessive food intake: excessive food intake in a short period of time or a large amount of irritating food, resulting in excessive expansion of the stomach body, may lead to impaired gastric function, or the accumulation of food difficult to digest, inducing food reflux. Daily diet should avoid overeating, excessively spicy, stimulating food, fast, large amounts of water and other bad habits can effectively relieve food reflux symptoms after meals; 2, gastroesophageal reflux: due to pyloric or cardia sphincter relaxation, the pressure in the stomach increases after eating food, squeezing the food reflux in the stomach into the esophagus and even into the mouth. Gastroesophageal reflux may also cause spasmodic contraction of the stomach wall, irritating the diaphragm and causing hiccups. If frequent acid reflux, you can take oral domperidone, chewable magnesium aluminum carbonate tablets and other drugs to relieve; 3, gastrointestinal dysfunction: stomach diseases such as chronic gastritis, gastric insufficiency, etc., may lead to gastrointestinal dysfunction, when the digestive function decreases, the food in the stomach digestion and emptying time is prolonged, while it may be accompanied by bloating and other discomfort, reflux of food into the esophagus and the mouth. Drugs such as oral morpholine can be taken to increase gastric power and reduce food residence time.