Internal Disc Disruption (IDD) is a disease that causes pain due to the disorganization of structures within the disc space.
When IDD occurs, the pain is greater when sitting down than walking, and when leaning forward than leaning backward. Unlike a spinal disc problem where the pain is caused by pressure against the spinal nerve root, IDD does not cause numbness in the legs or decreased leg muscle strength.
The symptoms of IDD are similar to those of a spinal disc problem, but IDD is clearly different. A spinal disc problem causes pain as the spinal disc is herniated due to degeneration or external force.