Facet Joint Injection In San AntonioFacet joint injection includes an injection into the spine in the neck, thoracic or low back area that is separate from the disc. There are small joints that support the weight of the body and commonly are sources of pain in at least 50% of the cases. With x-ray guidance, small needles can be placed and depositing cortisone into the joints and if significant improvement is obtained, but not long lasting, a further procedure called radiofrequency can be used to provide longer lasting relief for a period of six months to a year.