The old tongue biting is considered to be related to the signs of the following diseases: 1, the teeth bite relationship is bad, most commonly caused by the ground, you can go to the orthodontic treatment of dentistry; 2, heavy dampness, usually caused by spleen deficiency, will lead to a fat tongue, tooth marks, easy to bite the tongue when talking or eating, you can take oral treatment of ginseng and white atractylodes granules, you can also use adzuki beans and coix seeds to boil water to drink; 3, if the patient If the patient is older and has a history of chronic diseases such as diabetes and hypertension, frequent biting of the tongue may be a precursor of cerebral infarction, sometimes accompanied by blurred speech, drooling and so on. In order to be safe, it is best to go to the neurology department of the hospital and have a cranial CT examination for clarification; 4. In the most serious case, it may be a sign of tongue cancer, and in addition to frequent biting of the tongue, there will also be a numbness of the tongue, frequent ulcers, poor speech and slowed swallowing movements, which requires attention.