10 Causes of Low Back Pain
The origin of the pain is often unknown, and imaging studies may fail to determine its cause. Disk disease, spinal arthritis, and muscle spasms are the most common diagnoses. Other problems can also cause back pain, however.
Muscle and Ligament Injuries
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Strain and injury to the muscles and ligaments supporting the back are the major causes of low back pain. The pain is typically more spread out in the muscles next to the spine, and may be associated with spasms in those muscles. The pain may move to the buttocks but rarely any farther down the leg.