The diameter of the human esophagus is about 2cm and less than 1.5cm is considered a stricture. There are three strictures in the human esophagus, each of which is distributed in a different location. The first stricture, at the entrance of the esophagus, where the pharynx meets the esophagus, generally has no clear clinical significance, but is mainly where some food or foreign objects tend to get stuck. The second stricture, 7 cm below the entrance to the esophagus, where the left bronchus crosses the esophagus and where the trachea bifurcates, is of greater clinical significance and can be treated here in cases of esophageal disease or esophageal foreign bodies. The third stenosis is at the cardia of the esophagus-gastric junction, which is prone to esophageal cancer or gastric fundus-occupying conditions, and if the left atrium is pathologically enlarged, the indentation here is even more pronounced, and patients with advanced lesions can be considered for surgery or esophageal stent implantation. The thickness of the esophagus varies from person to person, so please have a detailed examination by a doctor and standardize the treatment under the doctor’s guidance.