toe and leg cramps

I have had 2 surgeries and have fusion with instrumentation L2 - L5 for severe degen disc disease and spondylolisthesis. I still have radiculopathy but what is worst is muscle cramps. If I lie on my back or lean back in a chair or stand for too long, my left big toe dorsiflexes painfully. Or the outside muscles of my left leg. Or the adductor muscles in left or both thighs. Causes? Treatments that help?