Drinking boiling water is not good for your body because if you drink water that is too hot, it can damage the oral mucosa. Water that is too hot can cause burns to the oral mucosa, and in some cases, blisters, or blood blisters may form. Excessively hot water is swallowed directly, through the esophagus into the stomach, will stimulate the esophageal mucosa, causing burns to the esophageal mucosa, or damage. If you often drink overheated water and irritate the mucous membrane of esophagus, it may cause esophageal cancer. The mucous membrane of esophagus has no receptors, so it cannot feel whether it is cold or hot, and it is not easy to detect the lesion after being stimulated. However, repeatedly drinking overheated water or food that is too hot is a causative factor of esophageal cancer, which is recognized by the medical profession.