Sciatica is an irritation or compression of nerve roots, commonly in the lumbar section of the spine. It is a possible result of issues with bones and tissues of the lumbar column. The nerves of this section of the spine travel to the lower body, which means symptoms of Sciatica may show up around these areas. Possible causes include:
An eruption in the outer wall of a disc that protects and provides support between vertebrae in which the bulge may press harmfully against a nerve root.
Degenerative Disc Disease
A degeneration or weakness of a spinal disc, which allows bones to shift out of position.
When bones discs or joints degenerate, bony spurs may form as a result of bones beginning to rub against one another. Bone spurs push into the spinal canal, and create harmful pressure against nerve roots