There are many reasons for the numbness of the root of the tongue, the common ones are cerebral infarction, burning mouth syndrome, cervical spondylosis and so on. 1. Cerebral infarction: due to cerebral vascular occlusion leads to insufficient blood supply to the brain, resulting in impaired neurological function can cause numbness at the base of the tongue. 2. Burning mouth syndrome: occurs in the oral mucosa, with burning pain as the main manifestation of a group of symptoms, with the tongue as the main site of onset, may also appear tongue sensory abnormalities tongue root numbness symptoms. 3. Cervical spondylosis: cervical spondylosis caused by prolonged low head work and other bad posture, compression of the peripheral nerve roots can also have numbness at the base of the tongue, accompanied by cervical pain, headache, dizziness, numbness of the upper limbs. Tongue numbness may also have other reasons such as trauma, etc., it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, targeted treatment.