“Disc bulges effacing the thecal sac” indicate degenerative disc changes but no significant neurological compression. This could cause local thoraco-lumbar back pain but no pain in the left leg.You have some degenerative disc disease in the L5-S1 segment (lowest disc) which can cause lower back pain. Keeping weight down and working on core strengthening would be the best way to treat these disorders. The MRI report is not too descriptive but nothing I see makes me think of surgery.
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.