The clinical manifestations of esophagitis and esophageal cancer are different. The main symptoms of esophagitis include upper abdominal pain, chest pain, belching, acid reflux, nausea, vomiting, and heartburn. In contrast, the primary symptom of esophageal cancer is choking and difficulty swallowing after eating. Therefore, these two diseases can be distinguished based on symptoms, and a definitive diagnosis can be made through gastroscopy. If gastroscopy reveals gastric mucosa with congestion, edema, erosion, or ulcers, it can be diagnosed as reflux esophagitis. If a tumor is found in the esophageal mucosa, and a biopsy is taken for pathological examination, it can confirm whether it is esophageal cancer. After a definitive diagnosis, treatment can be tailored according to the specific disease.