Facet injections are often used to diagnose and treat pain emanating from the facet joints.
Facet joints become especially vulnerable when the intervertebral disc of the spine is injured. As the disc degenerates, the volume of the disc is reduced and the disc space tends to flatten out. The disc therefore loses height and the space between the vertebral bodies becomes narrowed.
The flattening disc space provides much less support for the facet joints at that particular level, and the joints become subject to increased stress. Facet joint pain is often felt in the spinal area rather than in an arm or leg.
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