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 or a large amount of stimulating food in a short period of time, resulting in overexpansion of the body of the stomach, which may lead to impaired gastric function or the accumulation of food that is difficult to digest, inducing food reflux. Daily diet should avoid overeating, excessively spicy and stimulating food, fast, large amounts of water and other bad habits, can effectively relieve the symptoms of food reflux after meals; 2. Gastroesophageal reflux: due to the relaxation of the pyloric or cardia sphincter, the pressure in the stomach increases after eating food, squeezing the food reflux in the stomach into the esophagus, or even into the oral cavity. Gastroesophageal reflux may also cause the stomach wall to contract spasmodically, irritating the diaphragm and causing hiccups. If frequent acid reflux, you can take oral domperidone, magnesium aluminum carbonate chewable tablets and other drugs to relieve; 3, gastrointestinal dysfunction: gastric diseases such as chronic gastritis, gastric insufficiency, etc., may lead to gastrointestinal dysfunction, this time the decline in digestive function, the food digestion and emptying time is prolonged in the stomach, and at the same time, may be accompanied by abdominal bloating and other discomforts, will be the food refluxed into the esophagus and the oral cavity. Drugs such as oral morpholine can be taken to increase gastric motility and reduce food retention time.