Transforaminal Epidural Steroid Injection (TFESI) in Castle Rock
What is a Transforaminal Epidural Steroid Injection?
A transforaminal epidural steroid injection (TFESI) delivers anti-inflammatory steroid medication directly alongside a specific spinal nerve root where it exits the spine. The name refers to the foramen - the bony opening through which each nerve root leaves the spinal canal. By placing the medication precisely at the site of nerve irritation, a TFESI provides targeted relief for pain caused by a compressed or inflamed nerve.
This is the most precise type of epidural steroid injection. It targets a single nerve root rather than spreading medication broadly, which makes it especially useful for patients with sciatica from a disc herniation, arm pain from a cervical pinched nerve, or any condition where one specific nerve is the problem.
When is a TFESI Used Instead of Other Types of Epidurals?
A TFESI is typically the best choice when:
Your pain follows a specific nerve pattern - for example, sciatica shooting down one leg or pain radiating into one arm
Imaging shows a disc herniation or bone spur pressing on a specific nerve root
Your provider wants to confirm which nerve is causing your symptoms (because the injection targets one nerve at a time, it has diagnostic value)
Previous interlaminar or caudal epidurals provided partial relief but did not fully resolve the pain
For bilateral symptoms, stenosis at multiple levels, or post-surgical patients, an interlaminar or caudal epidural may be a better option. Dr. Carrera's team reviews your imaging to determine the right approach.
What Conditions are Treated with a TFESI?
Sciatica from a lumbar disc herniation
Cervical radiculopathy (pinched nerve in the neck causing arm pain, numbness, or weakness)
Lumbar radiculopathy from foraminal stenosis or bone spurs
Degenerative disc disease with nerve compression
Post-herpetic neuralgia (nerve pain after shingles)
How Should I Prepare?
Before your procedure, let the team know about all medications you are taking, especially blood thinners and NSAIDs (such as Advil, Aleve, meloxicam, or naproxen). You may need to stop these temporarily. IV sedation is rarely needed for this procedure, but if it is planned, avoid eating or drinking for several hours beforehand.
Arrange for someone to drive you home, as temporary numbness or mild weakness in the arm or leg on the treated side can occur. Wear loose, comfortable clothing.
What Happens During the Procedure?
You will lie face down on a procedure table. The skin is cleaned and a local anesthetic numbs the surface. Using fluoroscopy (live X-ray) for guidance, a thin needle is advanced to the foramen alongside the targeted nerve root. A small amount of contrast dye is injected to confirm the needle is in the correct position. The steroid and anesthetic mixture is then injected. The entire procedure takes about 2 to 5 minutes.
How Much Does It Hurt?
Most patients report mild discomfort. The needles used for this procedure are exceptionally thin - most patients say the injection is less uncomfortable than they expected, and many are surprised when it is already over. Patients typically rate the pain between 1 and 4 out of 10. You may feel brief pressure or a momentary increase in your usual pain pattern as the medication is injected near the nerve. This lasts only seconds.
What Should I Do After the Procedure?
Avoid strenuous activities for 24 hours.
You may gradually resume normal activities as tolerated the following day.
Avoid submerging the injection site in water (baths, pools) for two days.
Do not apply heat directly to the injection site for 48 hours.
Mild soreness at the injection site or temporary numbness in the arm or leg is common and usually resolves within a few days.
When Will I Feel Better?
Pain relief typically begins within one to two days after the injection, with full effects developing over about a week. Some patients notice improvement the same day from the local anesthetic, though this wears off in a few hours before the steroid kicks in.
How Long Does the Relief Last?
About 50 to 75% of patients experience at least 50% pain reduction lasting three months or longer. Some patients get enough relief from a single injection to complete physical therapy and recover without needing additional procedures. Others may benefit from a repeat injection if the first one provides meaningful but incomplete relief.
How Many Injections Can I Have?
If a TFESI provides good relief, it can generally be repeated up to three times within a 12-month period at a given level. The team monitors your response and adjusts the treatment plan based on how long each injection lasts and whether other options (like physical therapy or a different procedure) might provide more durable results.
Does Insurance Cover TFESI?
Yes. Most insurance plans cover transforaminal epidural injections when medical criteria are met - typically pain lasting at least six weeks that has not responded to conservative treatments. Some plans allow earlier treatment. Prior authorization is usually required, and Dr. Carrera's team handles this process so your referring provider does not have to.
In-Office Procedure - Lower Cost
Dr. Carrera's team performs transforaminal epidurals in the in-office procedure suite rather than a surgery center or hospital outpatient department. This typically results in significantly lower out-of-pocket costs for patients, especially those with high-deductible insurance plans. The procedure takes only minutes and most patients walk out of the office shortly afterward.
Schedule a Consultation
If you have sciatica or radiating arm or leg pain from a pinched nerve, a transforaminal epidural can deliver targeted relief directly to the affected nerve root. Dr. Carrera's team can typically schedule this procedure within one week of your consultation.