Patients who speak consciously with a hard tongue root may have a sudden onset of cerebral infarction or cerebral hemorrhage transient ischemic attack, which is caused by this type of acute cerebrovascular disease. For example, if the patient’s lesion is in the language center of the left cerebral hemisphere, it will manifest as language dysfunction, manifested by symptoms such as hard tongue root, incoherent speech or aphasia. In the case of cerebral hemorrhage, it usually starts when the patient is active, while cerebral infarction and transient ischemic attack usually start in a quiet state, and these two cases can be clarified by doing CT examination of the head. There is also the possibility that the patient’s stiff tongue may be caused by multiple cerebral infarction, as well as other systemic diseases, such as Parkinson’s disease, basal ganglia lesions and hepatomegaly, all of which can lead to stiff tongue symptoms. However, the onset of hard speech in these diseases must be gradual and progressive.