What is a Thoracic Epidural Steroid Injection

  • Epidural steroid injections help treat many painful spine-related conditions, including:

    – Disc herniation


    – Sciatica or radicular nerve pain


    – Post-surgical spine pain


    – Acute shingles (herpes zoster) and post-herpetic neuralgia


    – Cancer-related spine pain
  • ESIs are minimally invasive, non-surgical treatments used alongside physical therapy and other conservative care.

Goal of the Procedure

  • Many types of back and nerve pain are caused by inflammation around the spinal nerves.
  • Injecting a steroid (cortisone) into the epidural space helps calm inflammation, reduce irritation, and decrease pain.
  • The goal is to reduce nerve swelling, decrease sensitivity, and improve your ability to move and participate in rehabilitation.

The Procedure

  • The injection is performed in a sterile procedure room using X-ray guidance for accuracy and safety.
  • Most patients do not need sedation; the skin is numbed with local anesthetic.
  • Depending on the injection type, you may feel a brief “electric” sensation radiating into the arm or leg.

    – This is common, temporary, and not harmful.
  • The procedure typically takes 10-15 minutes.
  • After the injection, you’ll spend a short time in recovery before going home.

After the Procedure

Follow the instructions provided to you at discharge:

  • If sedation was used:

    – Do not drive or use heavy machinery for 24 hours.
  • Activity:

    – Resume normal daily activities as tolerated.


    – Showering is okay.


    – Do not soak in a bathtub, pool, or lake for 24 hours.
  • Pain relief timing:

    – It may take 7–10 days for the steroid to start working.