Lower left back pain can be severe, sharp, and stabbing, or it can be a dull and constant pain. It may be difficult to identify the difference between back pain and pain caused by an internal organ. Pain specifically in the lower left back may be caused by one or more organs, including the kidney and colon. A simple ultrasonogram whole abdomen will be helpful A homoeopathic constitutional treatment will give you a permanent cure since it acts by boosting the immune system or vitality