Facet joint injections contain a strong anti-inflammatory agent called corticosteroid and an anesthetic for pain relief. They are given to relieve pain in the back, neck, arm and leg and even headaches caused from inflammation of the facet joints. Facet joint injections are administered into the inflamed painful facet joints. These are the joints connecting each vertebra of the spine to the vertebra below it and above it. Each vertebra has four facet joints, one pair connects to the vertebra above and the second pair connects to the vertebra below. Thus they are present on both sides of the spine from the neck to the lower back providing flexibility and smooth movement to both the neck and the spine.