The cause of tongue like boiling water may be related to lingual inflammation, burning mouth syndrome or burns, and so on. 1. Tongue inflammation: caused by indigestion or nutritional deficiency, poor oral hygiene, can be manifested as the tongue like boiling water, the back of the tongue red, tongue swelling. 2. Burning Mouth Syndrome: common in women, localized burning sensation, accompanied by dry mouth or numbness of the mouth, tingling, change of taste and other symptoms. Primary and secondary, primary is mainly due to neurological abnormalities or psychosomatic factors. Secondary is mainly related to nutritional deficiencies or allergic factors, drug factors, oral irritation and so on. 3. Scalding. Eating too hot food, resulting in local mucosal damage, submucosal tissues are more sensitive to external stimuli, local numbness or tingling, and the tongue is as hot as boiling water. It is recommended to go to the hospital in time, under the guidance of professional doctors for standardized treatment.