Reflux esophagitis can cause chest pain. Food can only reach the stomach from the esophagus through the cardia, but not from the stomach to the esophagus through the cardia. When the stomach contents reach the esophagus through the cardia, the acid in the stomach contents can stimulate the esophageal mucosa and produce erosion of the esophageal mucosa, or even ulcers, causing burning pain and discomfort behind the sternum, so reflux esophagitis causes chest pain as a result of the interaction between stomach acid and the gastric mucosa. For patients with reflux esophagitis, attention should be paid to avoid overeating, avoid drinking alcohol, pay attention to the meat and vegetables, regular and quantitative meals, with appropriate acid suppressants and gastric mucosal protective agents and other drugs to take.