The epidural space is a fat-filled sleeve that surrounds the spinal sac which provides cushioning for the nerves and spinal cord. Steroids (‘cortisone’) placed into the epidural space have a very potent anti-inflammatory action that can decrease pain and lead to a better quality of life for patients. Steroids can break the cycle of pain and inflammation. They can also allow the body to compensate for the underlying condition. In this way, the injections can provide benefits that outlast the effects of the steroid itself.