Usually, cervical dural sac compression may be caused by cervical spine osteophytes, hypertrophy of the ligamentum flavum, and ossification of the posterior longitudinal ligament. When cervical osteophytes are more severe, the hyperplasia area can compress the dural sac, causing nerve root or spinal cord irritation and neurological symptoms. Since the ligamentum flavum is located at the back of the spinal canal, it can press into the dural sac if there is degeneration and hypertrophy, and in severe cases, it can press into the spinal cord and cause neurological symptoms. There may also be ossification of the posterior longitudinal ligament. If there is ossification and sclerosis of the posterior longitudinal ligament, it can press into the dural sac, and in severe cases, it can press into the spinal cord and cause severe neurological symptoms. In addition, cervical dural sac compression can also be seen in other diseases, it is recommended to go to the hospital in time to avoid delay.