Esophagitis is a relatively common disease in gastroenterology, so patients with esophagitis should visit the gastroenterology department. Generally, clinicians will inquire in detail about the medical history to understand the progression of the disease and the symptoms of the patient. Routine examinations typically include a barium swallow test or an upper gastrointestinal endoscopy. Under a barium meal examination, disorders of the esophageal mucosal folds and narrowing of the lumen can be detected. Upper gastrointestinal endoscopy can reveal inflammatory changes in the esophageal mucosa. Through the results of these examinations, systematic treatment can be administered.