Currently, for the examination of esophagitis in clinical practice, imaging studies are primarily used, including barium swallow tests and upper gastrointestinal endoscopy. Barium swallow tests are more commonly used in primary care hospitals, while upper gastrointestinal endoscopy is more frequently used in county-level and higher hospitals. Under barium swallow exam, it is possible to observe the disordered mucosal folds of the damaged esophagus, sometimes small niches and narrowing of the esophageal lumen can be seen. Under endoscopy, inflammatory changes in the esophageal mucosa can be detected.