Degenerative disc disease can produce pain as a worn disc becomes
thin, narrowing the space between the vertebrae. With less space available,
nerves may become compressed, causing them to swell and signal pain.
Pieces of the damaged disc may also break off and cause irritation
of the nerves. As the disc loses its ability to absorb stress and
provide support, other parts of the spine become overloaded, thus
leading to irritation, inflammation, fatigue, muscle spasms, and back
pain.
The amount of pain from degenerative disc disease can vary from naggingly
irritating to severely debilitating. Most patients have some underlying
chronic low back pain with intermittent episodes of severe pain. Usually,
sitting worsens the pain more than standing. Bending, twisting, and
lifting generally worsen the pain and lying down reduces it by relieving
the strain on the disc space.
In addition to back pain, there may
also be pain, numbness, and tingling in the legs if the disc degeneration
is located in the lower spine. Pain in the neck, shoulder blades,
arms, and hands as well as numbness and tingling in the shoulder and
arms may be present for disc degeneration in the upper spine.