A slipped disc irritates a nerve root, causing pain down the arm or leg. An epidural or nerve root injection delivers anti-inflammatory medicine directly around that nerve under X-ray guidance, calming it while the disc settles. It is a day-care procedure of twenty to thirty minutes and, for most patients, the step that lets rehabilitation begin.
Back or neck pain without arm or leg pain (a facet or sacroiliac problem is more likely — treated differently). Progressive weakness or bladder and bowel symptoms need a surgeon, not an injection. Active infection, uncontrolled diabetes or blood thinners that cannot be paused are reasons to postpone.
Common: temporary soreness at the site, and a headache in a small number of patients. Rare: infection, bleeding, nerve irritation, allergic reaction to contrast. Serious complications are very rare when performed under X-ray guidance with sterile technique. Roughly two-thirds of patients with disc-related leg pain get meaningful relief; the injection treats the inflammation, and the disc itself recovers over months. It does not “push the disc back”.
The space is the same; the purpose and medicine are different. This is a small, targeted anti-inflammatory dose, not continuous anaesthesia.
It calms the nerve so the pain settles while the disc shrinks on its own over months.
Light sedation is available; general anaesthesia is not needed and is avoided.
Desk work within one to two days; manual work after review.
The response itself is informative. Options include a repeat at a different level, regenerative therapy injection, or surgical referral if the nerve remains compressed.