Ankylosis in patients with facial muscular atrophy is due to abnormal facial sensation caused by neurological lesions, which may be related to facial neuritis, thalamic lesions and autonomic neurosis. 1. Facial neuritis: Facial neuritis caused by infection, poisoning, autoimmune disease often has abnormal facial sensation, and the patient may have ankylosis. 2. Thalamic lesion: Thalamus is the sensory center of human. Thalamic infarction, thalamic hemorrhage, or thalamic space occupation will usually cause sensory abnormalities, such as ankylosis, numbness, and pain. 3. Autonomic neurosis: Patients with long-term mental stress, high-intensity working environment, and lack of sleep will experience autonomic dysfunction, which will have different manifestations, such as discomfort in the peripheral skin and ankylosing sensation on the surface of the skin. Facial atrophy is a symptom or sign that must be carefully searched for the cause of the disease. If the cause can be identified and treated in time, the primary disease and the course of facial atrophy can be changed, thus promoting the disappearance of the ankylosing abnormal sensation. Repeated severe ankylosing sensation should be timely to the regular hospital, by the doctor to clarify the cause of the disease, and then give targeted treatment.