Hardness of tongue root may be caused by inflammatory swelling, cerebrovascular disease or tumor. 1. Inflammatory swelling: when the tongue body is infected due to trauma or local ulcers, the tongue body or the root of the tongue will show the clinical symptoms of inflammatory swelling and pain, and the patient will have the sensation that the root of the tongue is hard and the tongue is not free to move. 2. Cerebrovascular disease: when cerebrovascular disease such as cerebral infarction, intracerebral hemorrhage, cerebral atrophy occurs, patients will have stiffness of the tongue root, severe reduction of tongue flexibility, and inability to speak normally and other clinical manifestations. 3. Tumor: if tumor occurs in the root of tongue, especially malignant tumor, with the gradual growth and enlargement of the tumor, the patient will have the feeling of stiffness of the root of the tongue, foreign body sensation, and restriction of tongue movement. There may be other reasons for the hardness of tongue root. If the patient has the feeling of hardness at the root of the tongue, he should consult a doctor in time to clarify the cause of the disease and get early diagnosis and treatment. Do not carelessly ignore, so as not to delay the best treatment period of the disease.