Stiffness of the root of the tongue is often caused by local muscle contraction, or tongue motor dysfunction, often due to the hypopharyngeal nerve injury during surgery, or cervical spine compression of nerves, vascular lesions caused by local tongue symptoms, may also be caused by local inflammation or swelling. In this case, it is important to check whether there is any local tumor occurrence or pain, ulcer or erosion. If there are symptoms of such ulcers, there will be some obstruction of movement around the tongue, and the root of the tongue will be hardened, which needs to be ruled out by clinical examination or auxiliary examination. There is also a situation where there are problems in the pharynx, such as long-term mouth breathing, which can easily cause the tongue to fall back and snore, causing certain inflammatory symptoms in the surrounding tissues, which can also easily lead to the hardening of the tongue root.