CNS- Peripheral nervous system

[Filmmaker]

One more question for today:
we keep reading that MS is a central nervous system disease, however, the damn pai we feel is NOT from the CNS (as the brain does not have pain receptors) but from our periphreal nerves which also control muscles, so if we have pain and msucle spams, it must be from our peripheral nervous sytem! Now the good new is that the PNS is supposed to regenerate so why is it that we keep having those symptoms?