Patients with sudden numbness of the tongue and lips, mainly consider the following causes: 1, if the patient is in the case of eating, to consider the relationship with food allergies, this situation is mainly seen in eating seafood or mangoes, such substances, resulting in patients with oral mucosa allergies; 2, patients with sudden numbness of the tongue and lips on one side, most commonly caused by cerebrovascular disease. For example, cerebral infarction, transient ischemic attack or minor cerebral hemorrhage disease, we must promptly consult the hospital, improve the magnetic resonance, brain functional imaging, head CT examination to be clear, timely diagnosis and treatment, so as not to aggravate the progress of the patient’s condition. 3, the patient suddenly tongue, lips numb, if the front 2/3 of the tongue, to consider may be caused by peripheral facial palsy.