PenisHealthLife.net Axial lower back pain is the most common of the three. It is felt only in the lower back area with no pain radiating to other parts of the body. It is sometimes called mechanical back pain or simple back pain. * Description: Axial lower back pain can vary greatly. It may be sharp or dull, constant or intermittent. On a scale of 1 to 10, you may rate its intensity #1 or a full #10. It may increase with certain activity - when playing tennis, for example.