Does cervical stenosis usually get worse with time? And can it cause upper back ache and left arm to hurt some?

Sometimes. Spinal stenosis is usually an age related condition with specific relationship to degenerative changes in the spine which are ongoing with increasing age. Most are treated non operatively if symptoms present which can include pain in the region as well as pain in a limb.
May do. Cervical canal stenosis (say less than 13 mm across) is something you are born with, but with the passage of time and , aging process and degenerative disc problems symptoms may develop sooner the narrower the canal width.

Related Questions

Does cervical steonisis cause upper back pain and left arm to be sore at times?

Maybe. Cervical stenosis is caused by the opening in the vertebras of the neck being too small to allow the spinal cord to move freely. A nerve may be pinched as it comes off the main cord, and cause back pain, especially upper back and arm pain. Please see your doctor to have an exam and maybe some imaging to help figure it out. Read more...
Yes. Cervical stenosis means that the canal where the nerves and spinal cord travels in the neck is narrow. This can cause pinching in nerves that radiate pain, numbness, and/or weakness to an arm and upper back. Treatment can include nsaids (ibuprofen, naproxen, etc), physical therapy, epidural injections, and lastly surgery if all else fails. Read more...

Can cervical stenosis cause upper back pain for 2 years? It is deep I'm right shouldr. Not present at rest. Only when when I am sitting at desk job.

Very possible. You would need a physical exam to be sure, but is very possible that cervical stenosis could be causing this pain, especially if you notice it at specific positions. The narrowing could be irritating either the main cord or the foramina where nerve roots come out which also can cause this referred pain. You should have a physical exam, procedure options, workspace overhaul, and maybe pt. Read more...
See a neurologist. Cervical canal stenosis(usually less than 13 mm in width) is something you are born with. If you have arthritic changes with a narrow canal symptoms are more likely ( cervical spondylosis and radiculopathy ) but leave the diagnosis to a neurologist. Read more...