There are two facet joints at either end of a vertebral segment in the spine. In the lumbar spine, these joints help give stability to the spine and help guide its motion. Because of a back injury, arthritis or mechanical stress on the lumbar spine, there can be low back pain. One treatment of this type of pain is the lumbar facet injection. The relief of pain the person receives can help them participate in physical therapy in order to strengthen the back and keep it pain free.
Lumbar facet injections have two primary goals: the first is to help diagnose the cause and location of the low back pain and the other is to give pain relief. A facet joint injection can find the source of the pain by injecting the joint with an immediate relief anesthetic. If the pain is relieved at a particular facet joint, it is the likely source of the pain. This is especially true if complete relief is obtained.