Numbness of tongue and face may be caused by facial nerve palsy, and similar symptoms may be caused by intracranial tumor or nasopharyngeal cancer. Facial nerve palsy is caused by spasm of local blood vessels that nourish the nerves, resulting in ischemia of local facial nerve tissues, or even edema, causing local twitching and numbness, which can be clinically caused by rheumatic facial neuritis or otitis media. In addition, thrombus or mass or tumor in the face or cranial brain can cause edema of the nerve tissue, which can compress the nerve and affect the function of the nerve, and also cause local numbness in the face. Malignant tumors in the roof of the nasal cavity can lead to damage to local blood vessels and nerves, and if the tumor keeps spreading to the face, it will affect the function of facial nerves, thus leading to local numbness and pain.