The most frequent symptom of a herniated disc in the lower back is pain radiating from this region into one or both of the legs. Similarly, in the cervical spine, pain radiates into the arms.
The disc has a tough outer layer (annulus) surrounding a jelly-like substance in the center (nucleus). A herniated disc occurs when the nucleus breaks through the outer tissue layer. The discs are in front of the spinal cord and exiting nerves, and the herniated material may compress the nerves.
Herniated Disc: Full Description
Between each bony vertebral body is a disc that acts as a shock absorber and a hinge. As we age, the disc becomes dehydrated, making it less supportive and more prone to injury. Even a healthy, well-hydrated disc can be injured. The disc is composed of the annulus, which is a tough tissue that makes up the outside of the disc. The nucleus pulposus is the jelly-like substance contained in the center of the disc. A herniated disc occurs when the nucleus breaks through the outer tissue. A herniated disc is very common and may or may not cause symptoms. Stretching or tearing of the annulus may result in back or neck pain. The discs are immediately in front of the spinal cord and exiting nerves, so when the herniated disc or protrusion compresses the spinal cord or nerves, leg or arm pain and numbness or weakness may occur.