A person suffering from lower back, arm, neck, or leg pain may be diagnosed with a herniated disc.  In order to truly understand what this means, it is important to know what a disc is made up of and what the functions are of a healthy disc.   A disc is made up of a tough outer core and a gel-like inner material.   A disc functions as a spacer, shock absorber, and motion unit.

The lumbar section of the back is where the majority of herniated discs will occur.  The lumbar segments of the back are located in the lower back.  A lumbar herniated disc occurs when the inner gel-like material leaks out of the outer core.  A herniated disc in the lumbar section of the spine can put pressure on the spinal nerve root.  This will cause sciatica, which is pain that can shoot down the leg.

Nearly 90% of herniated disc in the lumbar area will occur at the bottom of the spine.  The spine is described in segments.  Most herniated discs occur in lumbar segments 4 and 5 (L4-L5), which will cause pain in the L5 nerve, or lumbar segment 5 and sacral segment 1 (L5-S1), which will cause pain in the S1 nerve.   Symptoms will depend on where the herniated disc is located within the Lumbar segments.