Esophageal stricture can cause symptoms such as difficulty swallowing, nausea, vomiting, and in some cases, sternal pain, burning, and acid reflux. When people with esophageal stricture swallow food, they have difficulty swallowing because the food is relatively narrow when it passes through the esophagus. When eating liquid or semi-liquid food, the symptoms are not particularly obvious, but when eating hard food, the swallowing obstruction will be obvious. The more severe the esophageal stricture, the more obvious the swallowing obstruction will be. Some people experience nausea and vomiting due to the blockage of food and even irritation of the throat mucosa when swallowing. In some people, esophageal stricture is caused by esophagitis, and when acid reflux invades the mucous membrane of the esophagus, pain in the sternum, and burning and acid reflux in the chest area may occur.