An epidural steroid injection is a procedure performed at Piedmont Interventional Pain Care to address referred pain in the leg or arm, as well as back or neck pain that result from spinal nerve irritation. Spinal nerves may become irritated due to spinal stenosis, spondylolisthesis (a slipped vertebra), or when a disc becomes herniated. These conditions can put pressure on the nerve, causing it to become inflamed. As the nerve occupies more space due to inflammation, it can brush against other corporeal structures that further irritate and inflame the nerve. The epidural steroid injection delivers steroids to the tunnel that surrounds and cushions the spinal cord (the epidural space). The steroids have an anti-inflammatory effect on the nerve that reduces pain, enabling patients to improve the function of the painful area. Though the steroids do not directly resolve the underlying condition causing the pain, they are able to break the cycle of pain and inflammation, allowing the body to compensate for the condition. The benefits of the steroids are usually felt within one to three days of the injection, though sometimes it may take up to a week for the patient to feel pain relief.