Reflux esophagitis refers to the reflux of gastroduodenal contents into the esophagus, resulting in erosion and ulceration of the esophageal mucosa, which may manifest as heartburn, reflux and other symptoms, and can be cured through treatment. Reflux esophagitis is a common clinical digestive disease, often caused by decreased anti-reflux function, decreased esophageal clearance, decreased esophageal mucosal barrier function, delayed gastric emptying, etc. It can present with esophageal symptoms such as heartburn, acid reflux, and extra-esophageal symptoms such as pharyngolaryngitis and chronic cough. Gastroscopy is the most accurate method to diagnose reflux esophagitis, and esophageal mucosal erosion and ulceration can be seen under the microscope. The treatments for reflux esophagitis include medication, maintenance therapy and surgery. Clinically, the main use of drug treatment, such as gastrointestinal stimulants, acid inhibitors and so on. If drug treatment is ineffective, anti-reflux surgery can be considered. Patients with reflux esophagitis should pay attention to the fact that they should not lie down immediately after meals during the day, and reduce factors that increase abdominal pressure such as obesity and constipation. When symptoms such as acid reflux and heartburn occur and esophagitis is suspected, the patient should consult a doctor in time, undergo relevant examinations to make a clear diagnosis, and be treated under the guidance of the doctor.