i had back surgery three years ago, now my left leg is numb and i have no flexibility in it , why is that? I recently just started working out again and im trying to loose weight. Should i keep trying to stretch my hamstrings because they are very tight. This was happening before i started working out again. I dont want another surgery is this something i will have to live with for the rest of my life? Will it get worse? Will it paralyze me? what can i do to eleiviate the numbness and be pain free again?