Spinal fusion is becoming more common for a variety of reasons and conditions. Unfortunately, the end result of multiple fusion procedures can be deformity of the spine, leaving a person with bent posture and possibly difficulty walking because of that posture. In some cases, there may also be persistent nerve pain in the legs.
Treatment of post-operative spinal deformity should be aimed at maintaining strength and mobility through exercise like hydrotherapy. Pain killers such as anti-inflammatories (Nurofen, Mobic etc) and even strong analgesics can be useful if used carefully. Walking aids such as sticks and frames can be very helpful.
Surgery can correct post-operative spinal deformity, though this is often a complex procedure and requires a week or more in hospital with rehabilitation afterwards.