Hi I have just had surgery one week ago today on l4/l5 . Everything was great no pain then on way home serious pain in my right lower buttocks to behind knee . Then it became fine for a day. And today it's back . I can walk and when I walk like Frankinstine there's no pain . I have however had real pains in back and leg . Foot and knee for three years previous and walked like the Hunchback . Could the pain be as I am now walking straight ... Please help.