Hello!
Back injuries and falls can cause lumbar spine problems.
Get present day scans done and diagnose your spinal back problems properly.
Follow up with an orthopedician.
If conservative treatment fails you have to explore surgical methods.
You should maintain normal body weight, wear supportive belts, apply warm and cold compress, strengthen back muscles, take intermittent pain killers, consider steroid shots and ergonomic corrections in your daily living.
Take care!