Chronic pain is not uncommon in MS and other neurological disease patterns. Is the pain a comorbidity of the neurological disease, or should we be looking at other factors for the cause? Unfortunately, the pain is most often treated with pharmaceuticals and the cause is overlooked by the medical community. Here is a recent blog entry by Dr Chris Centano which addresses chronic pain.
https://www.regenexx.com/chronic-nerve-pain/

Pain signals that something isn't right and resolves as the issue does. Chronic Nerve Pain is an entirely different thing...