The discs in between your vertebrae act as a cushion and allow for easier spinal movement. Whether it be through old age or injury, these discs can start to deteriorate. The discs may lose some of their height, causing bone to grow around the edges of vertebrae. Eventually, this can cause the spinal canal to narrow and put pressure on the spinal cord and nerves.
Neck, arm, back, and leg pain are very common. You may also experience tingling or weakness in the extremities or have trouble walking.