Numbness of the tongue is mainly seen in the following areas: First, if it is primary linguopharyngeal neuralgia, the cause is not very clear. Secondly, secondary factors cause lesions of the linguopharyngeal nerve, which cause numbness and pain in the tongue. Secondary factors include tumors of the skull base, nasopharynx, tonsils, or inflammation that invade the linguopharyngeal nerve and cause tongue numbness, such as intracranial aneurysms of blood vessels, posterior inferior cerebellar artery or vertebral artery, which compress the conduction pathway of the linguopharyngeal nerve and cause tongue numbness. If the numbness is paroxysmal, the patient should be asked whether the numbness is paroxysmal or persistent. If the numbness is paroxysmal and improves for a period of time, the patient should be asked whether there are functional reasons such as anxiety and tension.