Caudal Epidural Steroid Injection in Castle Rock
What is a Caudal Epidural Steroid Injection?
A caudal epidural steroid injection delivers anti-inflammatory steroid medication into the epidural space through the sacral hiatus - a small natural opening at the base of the tailbone. The medication travels upward from this entry point into the lower lumbar epidural space, where it reduces inflammation around compressed or irritated nerve roots.
The caudal approach is one of three types of epidural steroid injections. It is most commonly used for patients with lower back and leg pain affecting multiple nerve roots, and it is often preferred for patients who have had previous lumbar spine surgery.
When is a Caudal Epidural Used?
A caudal epidural is typically chosen when:
You have had previous lumbar spine surgery. Scar tissue (epidural fibrosis) from prior surgery can make it more difficult and riskier to place a needle in the lumbar epidural space from above. The caudal approach enters below the surgical area and avoids the scar tissue entirely.
Your pain involves multiple nerve roots in the lower back. Because the medication spreads broadly from the caudal entry point, it can reach several levels at once.
You have bilateral symptoms. The caudal approach provides coverage to both sides of the epidural space.
Other epidural approaches are not feasible. Certain anatomical variations or previous hardware may make the caudal approach the safest option.
What Conditions are Treated with Caudal Epidurals?
Failed back surgery syndrome (persistent pain after lumbar spine surgery)
Post-laminectomy syndrome
Lumbar spinal stenosis at multiple levels
Bilateral sciatica or radiculopathy
Lumbar disc herniations affecting lower nerve roots
Epidural fibrosis (scar tissue) compressing nerves after surgery
How is a Caudal Epidural Different from a Transforaminal or Interlaminar Epidural?
All three types of epidurals deliver steroid medication to the epidural space - they differ in where the needle enters and how the medication spreads.
Transforaminal (TFESI): Enters alongside a single nerve root. Most precise. Best for one-sided pain from a specific disc herniation.
Interlaminar (ILESI): Enters between vertebrae from the back. Broader spread. Good for stenosis and bilateral symptoms.
Caudal: Enters from the tailbone. Broadest spread in the lower lumbar region. Preferred for post-surgical patients and multi-level lower back conditions.
Dr. Carrera's team selects the approach based on your specific condition, surgical history, and anatomy.
How Should I Prepare?
Let the team know about all medications you take, especially blood thinners and NSAIDs. You may need to temporarily stop certain medications. IV sedation is not typically needed for this procedure. Arrange for a ride home, as mild numbness or weakness in the legs can occur temporarily. Wear comfortable clothing.
What Happens During the Procedure?
You will lie face down on a procedure table. The skin over the lower tailbone area is cleaned and numbed with a local anesthetic. Using fluoroscopy (live X-ray), the provider identifies the sacral hiatus and advances a needle into the caudal epidural space. Contrast dye is injected to confirm correct placement and visualize how the medication will spread. The steroid and anesthetic mixture is then injected. The procedure takes about 5 to 10 minutes.
How Much Does It Hurt?
The caudal approach is generally well tolerated. The sacral hiatus is near the surface, so the needle does not need to travel as deep as with other epidural approaches. Most patients feel brief pressure and mild discomfort during the injection. The skin is numbed with local anesthetic beforehand.
What Should I Do After the Procedure?
Avoid strenuous activities for 24 hours.
Resume normal activities gradually the next day.
Avoid submerging the injection site in water for two days.
Mild soreness at the injection site and temporary leg numbness are normal.
When Will I Feel Better?
Pain relief typically begins within one to two days, with full effects developing over about a week. Some patients experience immediate temporary relief from the local anesthetic that wears off before the steroid takes effect.
How Long Does the Relief Last?
Duration varies. Many patients experience meaningful relief for several weeks to several months. For post-surgical patients with scar tissue, caudal epidurals may need to be repeated periodically. If the injection provides good short-term relief that wears off, a series of caudal epidurals or a caudal adhesiolysis procedure may be considered for more sustained results.
Does Insurance Cover Caudal Epidurals?
Yes. Most insurance plans cover caudal epidural injections under the same criteria as other epidural types - typically pain lasting at least six weeks with failure of conservative treatments. Prior authorization is usually required, and Dr. Carrera's team manages this process in-house.
Schedule a Consultation
If you have persistent back or leg pain - especially after spine surgery - a caudal epidural may be the right approach. Dr. Carrera's team can evaluate your symptoms and determine whether this procedure fits your treatment plan.