Vomiting after eating is harmful to the body and can more easily induce diseases in the esophagus and stomach. In vomiting, stomach acid inevitably comes into contact with the mucous membrane of the esophagus because the food in the stomach has been neutralized with stomach acid. The corrosive nature of stomach acid is very strong, and the frequent contact of stomach acid with the esophageal mucosa will lead to damage of the protective barrier of the esophageal mucosa, thus making it more likely to induce esophagitis. In the process of inducing vomiting, the stomach wall will spasm and contract, which will affect the stomach’s function of digesting food and increase the possibility of suffering from gastritis and gastric ulcer in the long run. Some people are suffering from gastric ulcer disease, these people in the process of emetic, due to increased pressure in the stomach, food irritation, and even induced gastric perforation. Frequent emetics can also affect the nerves and can even induce anorexia nervosa.