It is uncommon but not impossible that opposite site symptoms occur. Positioning during surgery could have put pressure on opposite side ankle nerves which could leave a numb heel temporarily. It is possible that a small fragment of disc migrated to the opposite side or even a seroma (collection of fluid) is causing some compression. You could ask for some oral steroid which can take down symptoms faster that just “Father Time”. If symptoms don’t resolve in 5-7 days, you could also ask for a new MRI.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.