Round pads of cartilage sit between each spinal vertebra providing shock absorption and allowing the primary movements of the lower back. While disc herniation can occur anywhere in the spine, they are most common in the lower back region.
The discs in your spine are made up of three parts. The center part of the disc may herniate through a weakened or degenerated wall where it then puts pressure on the spinal column. This herniation causes pain in the lower back and legs along with other symptoms that can include both tingling and numbness in the legs and feet.