Epidural Steroid Injection for Sciatica and Nerve Pain: How It Works, Explained Simply

Video Transcript

An epidural steroid injection aims to calm the inflammation around an irritated spinal nerve, a common cause of sciatica and radiating leg pain. It's done in a procedure room while you lie on your front, awake, with the skin numbed. A live X-ray called a fluoroscope guides the needle. A thin needle is advanced toward the epidural space, the thin layer that surrounds the spinal nerves. A little contrast dye confirms the position before any medicine goes in. There are a few routes to that space: between the vertebrae, alongside an exiting nerve root, or through a small opening at the base of the spine. The doctor chooses based on your anatomy. Then a corticosteroid, often with a local anesthetic, is placed around the inflamed nerve to reduce the swelling that is driving the pain. Here is the key point. The steroid calms inflammation. It does not remove a herniated disc or widen a narrowed canal. Relief varies. Many people feel better for a few weeks, sometimes longer, and it can take a few days to begin. Some notice little change. Because the effect is temporary, injections are usually limited to a few per year, as one part of a plan that includes physical therapy. A few cautions. This is an off-label use of steroids, serious complications are rare but possible, and if you have diabetes your blood sugar can rise for several days afterward. This video is for general education only. It is not medical advice. Ask your doctor what's right for you.