Low back pain refers to the sensation of pain, tension, or stiffness felt in the region from the lower edge of the rib cage to the lower part of the buttocks. In medical literature, it is also referred to as "lumbago."
The lumbar region has a complex structure consisting of five lumbar vertebrae (L1-L5) that carry the body's center of gravity, the discs between these vertebrae, ligaments, and strong muscle groups. The spine not only carries the weight of the upper body but also protects the spinal cord.
The intervertebral discs between the vertebrae provide flexibility to the lower back and act as shock absorbers. Low back pain can generally occur as a result of a sudden strain (acute) or can develop due to long-term poor habits (chronic).