Numbness and astringency of the tongue are abnormalities of oral sensation, which can be caused by many factors: 1. jaw fractures, mainly caused by facial trauma to the lingual nerve, need to treat the fracture symptomatically and use rat nerve growth factor and methylcobalamin to nourish the nerve. 2. oral cancer, in addition to numbness and astringency of the tongue, is often accompanied by oral swelling or ulcers that do not heal over time, and histopathological examination can confirm the diagnosis. 3. chronic, systemic diseases can also cause, such as diabetes, cerebrovascular disease, etc., which can lead to neuritis and blood microcirculation disorders. It can be caused by diabetes, cerebrovascular disease, etc., which leads to neuritis and blood microcirculation disorders causing numbness of the tongue. 4, cervical spine diseases can also cause, accompanied by cervical stiffness, neck pain, dizziness and other discomforts, if the cervical spine disease appears numbness and astringency of the tongue, it may indicate the aggravation of the disease, it is recommended to go to the hospital for cervical spine CT to clarify.