Esophageal ulcers are necrotic lesions that occur in various segments of the esophagus due to different etiologies, i.e., inflammatory lesions formed by the destruction of the mucosal, submucosal, and muscular layers of the esophagus. Specifically, it is an ulcer that occurs below the pharynx and above the dentate line. The normal human esophagus is about 25-30 cm long. It is about 15 cm from the incisors to the upper end of the esophagus and about 40-42 cm to the end of the esophagus. There are also 3 physiological strictures in the esophagus, which are good sites for foreign body retention and esophageal cancer. Clinically, the esophagus is often divided into 3 segments: upper, middle and lower. Except for corrosive esophagitis; most esophageal ulcers caused by other diseases occur in the middle and lower segments of the esophagus. Patients with esophageal ulcers may have the following symptoms due to the stimulation of acidic gastric juice and feeding: 1. Pain behind the lower sternal segment or high upper abdomen. The pain often worsens after eating or when drinking, and may spread to the interstitial shoulder swelling area, left side of the chest, or radiate upward to the shoulder and neck. Sometimes the pain resembles coronary heart disease or angina pectoris. It should be differentiated. The diagnosis can be determined by detailed history and physical examination, and by electrocardiogram, barium meal and esophagoscopy. 2, dysphagia, is also a more common symptom. Dysphagia is a feeling of obstruction when eating and swallowing. At first, it is only difficult to swallow solid food, but later, as the disease progresses, even liquid food can feel obstructed. This is because the stimulation of food after eating can cause spasmodic contraction of the esophagus in patients with esophageal ulcers and cause difficulty in swallowing. In addition, chronic ulcers can cause local scarring and narrowing, which is also an important reason for dysphagia. 3, esophageal ulcer can also appear nausea, vomiting, belching and other symptoms, which is caused by the destruction of the normal peristalsis of the esophagus. 4, due to the patient’s long-term poor feeding, can also appear anemia and weight loss and other symptoms.