A transforaminal epidural injection is a steroid injection into the opening of the spine called the neural foramen, just above the opening of the nerve root and outside the epidural space. The injection is guided by x-ray and contains local anesthetic, saline and a long acting steroid. These injections are commonly performed for chronic lower back or leg pain and assist with reducing inflammation and swelling around the spinal nerve roots. This may, in turn, be effective to reduce pain, numbness, tingling and other symptoms associated with chronic pain. Effective pain relief is typically recognized within 2-3 days post procedure with lasting effects of up to several months. Periodic injections may be warranted for long-term effective relief.