An Epidural Steroid Injection (ESI) is an outpatient procedure where a doctor uses real-time X-ray guidance (fluoroscopy) to inject steroids into the epidural space of the spine. The medication works directly to reduce inflammation around the nerve roots caused by compressed nerves. The procedure and recovery take approximately 30 minutes.
ESIs work by injecting steroids into the epidural space: the area surrounding the spinal cord. Steroids are anti-inflammatory medications that help reduce inflammation when injected in the nerves, nerve roots, disc spaces, and connective tissue. By decreasing inflammation, ESIs relieve pain, numbness, and tingling, allowing the nerves to function more effectively.
Proper preparation is essential to ensure a smooth procedure. Follow these steps before your appointment:
Recovery: You will be monitored for 10 minutes before returning home.
Pain Relief: It often takes 24–48 hours for the steroid to begin working.
Aftercare: Most patients resume normal activity the next day, though avoiding strenuous activity for 24 hours is recommended.
Complications are rare but can include infection, bleeding, or a temporary increase in pain.
The effects of the steroid vary by individual. Most people experience symptom relief for 2 weeks to several months.