The temperature of our mouth and esophagus mostly in 36.5℃ - 37.2℃, the highest can withstand the high temperature is about 60℃.

　　When the temperature of the food intake exceeds 75℃, the esophageal mucosa will be slightly burned. And our daily "eat while hot" food is basically in 70℃ ~ 80℃, can not avoid to burn esophageal mucosa.

　　Of course, the lining of the esophagus itself has the ability to repair itself when it gets burned occasionally. However, if you develop the habit of "eating while hot", the esophageal mucosa will be in a vicious cycle of [injury-repair -- injury-repair] :

　　"On the one hand, mucous membranes continue to thicken, so that people who love hot food are more and more afraid of hot;

　　On the other hand, during the continuous repair of the mucous membrane, bad "heteromorphic" cells will be produced, and then malignant changes will occur, which will eventually lead to esophageal cancer.