Stiffness at the base of the tongue may be a disease of the lingual nerve or sublingual gland, or it may be a precursor of craniocerebral disease. 1. Stiffness of the tongue root may be caused by lesions of the lingual nerve, or cysts or tumors of the sublingual gland, which require medical attention from the stomatology department of the hospital. 2. Craniocerebral lesions can also appear tongue root stiffness, including cerebrovascular disease, cerebral blood supply insufficiency or craniocerebral tumors, especially with high blood pressure, hyperlipidemia, diabetes mellitus or the age of the need to be vigilant, and need to timely to the neurosurgery department for medical treatment. Therefore, the hardness of the tongue root is often seen in the above conditions, need to go to the stomatology department or neurosurgery for medical treatment, if necessary, for brain CT or magnetic examination, do not be careless, so as not to delay the condition.