Among the 3 strictures of the esophagus, the first stricture is the entrance of the esophagus, about 15 cm from the incisors, which is generally prone to throat discomfort and food impaction, leading to esophageal stricture. The second stricture is 25-27 cm from the incisor. This location is prone to esophageal cancer lesions and requires extra attention during gastroscopy, especially in hospitals that have the conditions to consider NBI with staining and magnification, because this stricture is the fastest and most traumatic location during the passage of food and is also prone to early esophageal cancer or esophageal scratches. The third stricture is the location at the junction of the esophagus and stomach, also known as the cardia, which is prone to esophageal scratches and in some cases, mucosal tears of the esophageal cardia, and requires extra attention.