The causes of numbness in the tongue are as follows: First, transient ischemic attack caused by ischemia and hypoxia in the brain is considered, mainly caused by ischemia in the posterior circulation. Second, cervical spine compression to the nerve will also appear tongue tingling symptoms, this is related to cervical spondylosis, as well as because of facial neuritis or compression of the facial nerve, resulting in the appearance of taste dysfunction of the tongue. Third, trigeminal nerve lesions, including inflammation of the trigeminal nerve and vascular compression of the trigeminal nerve, can also show sensory impairment of the tongue, and symptoms of tingling can occur. Fourth, there is also a part caused by damage to the hypoglossal nerve, because inflammation or ischemia can lead to symptoms of numbness of the tongue.