is reinjury of diff. body part with RSD, CRPS able to heal on it's own over time if patient is careful not to reinjur it again if so how long should healing take?

i've had reflex sympathetic dystrophy since August of 1997. over that time i've fallen n had reinjuries in diff. places on my body and now have no probs with it. however i have pinched nerve on my lumbar L4 L5 region n it still hasn't healed i continue to have injections. the RSD however began with surgery on left knee from n old softball injury when i was a kid. i would continue to have flareups that would clearup till the next time i'd bend, turn a certain way whatever n it would cause it to feel as though i had sprang it again. it was the primary surgery that did the lt. knee; thanx linda