Pain in the tongue is not necessarily a precursor of cancer. In order to diagnose oral cancer or tongue cancer, two main characteristics are needed: first, the time of the tumor will be painful for a long period of time, and usually the ulcers or herpes in this area still haven’t been eliminated in about 2 months. Secondly, occupying lesion means that the swelling can be touched by hand, and the base is very hard, then we should suspect that it is cancerous ulcer or cancerous tumor. Most of the general tongue pain is due to the traumatic pain caused by the grinding of the tooth tip, which gradually disappears after adjusting the grinding of the tooth tip; or the patient himself has recurrent mouth ulcers, which can also cause tongue pain, but they are not the precursors of cancer.