Heartburn is a common symptom of gastritis and reflux esophagitis. Heartburn in gastritis is a particular symptom that occurs when the gastric mucosa of a patient with gastritis is damaged and stimulated, and the increased secretion of gastric acid, combined with the increased pressure in the gastric cavity or the lower esophageal sphincter, leads to reflux of gastric acid through the gastric cavity into the cardia esophagus and even into the oral cavity. The burning sensation behind the sternum or under the glabella is caused by acid or food in the stomach lumen burning the esophageal mucosa, cardia mucosa or gastric mucosa. It is recommended to apply drugs that inhibit stomach acid, protect the mucosa and promote gastric motility, such as omeprazole and morpholine, for symptomatic treatment.