A facet joint block is a diagnostic and therapeutic procedure performed to identify and alleviate pain originating from the facet joints in the spine. The patient is positioned lying face down, and the skin in the targeted area is cleansed and numbed with a local anesthetic. Under fluoroscopic guidance, a thin needle is inserted into the facet joint or its surrounding tissues. A mixture of local anesthetic and anti-inflammatory medication, such as a corticosteroid, is injected into the joint. This temporarily numbs the joint and reduces inflammation, providing pain relief. The procedure usually takes about 15-30 minutes, and its effects may last for a variable duration depending on the individual's response.