Dysphagia is a type of disease caused by dry esophagus, esophagus and cardia stenosis, with obstruction in swallowing food, even food cannot be swallowed into the stomach, and vomiting as the main clinical manifestation. "Obstruction" means obstruction when swallowing food; "diaphragm" means rejection, which means esophageal obstruction, food cannot be swallowed into the stomach, and vomiting as the main clinical manifestation. "Obstruction" is a mild symptom of "dysphagia". It can be a separate disease or a precursor to "diaphragm", so it is collectively referred to as "dysphagia" in clinical practice. This disease occurs at a higher age and is more common in middle-aged and elderly men. It is still a difficult-to-treat disease. Therefore, if middle-aged and elderly people have unexplained eating disorders, they should seek medical attention as soon as possible and undergo relevant examinations to clarify the diagnosis and early treatment.