Overeating and vomiting can lead to esophageal burns, cardia relaxation, and impaired gastric function. First of all, food will be neutralized with digestive juices after ingestion into the stomach, when the acidity of the food is stronger, the food vomited during emetic will have stronger acidic substances, which will cause burns to the esophageal mucosa when passing through the esophageal area, and may even cause esophagitis. Secondly, because of the mandatory expansion of the cardia sphincter in the process of emetic, long-term overeating and emetic will lead to cardia relaxation, and in severe cases, may even induce cardia mucosa tear, and the possibility of reflux esophagitis is higher in these people. Finally, the stomach wall will contract and spasm during emetic, once in a while the effect is not particularly large, but often emetic will cause some damage to the peristaltic function of the stomach, long-term will lead to a weakened gastric power, the phenomenon of indigestion.