Epidural Steroid Injection (ESI)

An epidural steroid injection (ESI) is considered a conservative, non-surgical treatment option for chronic pain due to spinal nerve compression or inflammation. The steroid is injected into the epidural space inside the spinal canal but outside the membrane that protects the spinal cord. The ESI has an anti-inflammatory effect, decreasing both swelling around and irritation of the nerve, which results in pain relief. The effectiveness of these injections varies from patient to patient; multiple injections may be needed over a period of time to experience maximum benefit.