If CSM is not treated, it will usually stay the same or get worse. There's no way to predict whether it will get worse. Your doctor will talk with you about the pros and cons of the treatment options. Mild cases of CSM can be treated with neck braces or neck traction, but it's not clear whether these treatments help in the long run. Surgery to reduce the compression of the spinal cord may help some people, but it doesn't help everyone. Medicines can relieve pain caused by CSM, but they don't help other symptoms such as weakness or numbness.
It seems reasonable to assume that the prevention of neck injury, good posture and maintenance of normal spinal segment mobility may reduce the wear and tear factor on the supportive elements of the neck and therefore impact the development of spondylosis. It is has not yet been determined whether this has a long-term impact on the development of progressive cervical spondylosis and stenosis. The individual with high-grade cervical stenosis should attempt to avoid any neck position or neck injury that could injure the spinal cord resulting in myelopathy.