Get a fresh MRI
scan for operated part of spine for evaluation.Often the sensations described by you
in lower limb are parasympathetic/sympathetic in nature and probably have little bearing to fresh compression in lumber region spinal cord
. In any case get re-evaluation done as the symptoms described pertain to sacral area (lower back- cauda equina?)
Take some tabs/injections of vitamin B1B6B12(neurobion
) or what your doc.advises.