The epidural steroid injection is the placement of cortisone, a powerful anti inflammatory agent, into the epidural space, which approximates the disc and spinal column. The treatment of epidural injection has been around for over 40 years. It involves using either steroids or anesthetic agents allowing good benefit with minimal risk. The main goal of the epidural injection is to decrease any inflammation or pain resulting from disc problems, arthritis, or stenosis, which may be irritating a spinal nerve.