Epidural Steroid Injection vs Cortisone Shot - What's the Difference?
They Are All Cousins
"Cortisone shot" is a general term people use to describe any injection that contains a corticosteroid - a medication that reduces inflammation. There are many different steroid medications, and they are all cousins of each other. A pain specialist picks the right one based on where the injection is going and what it needs to do.
For example, dexamethasone is commonly used for injections around nerves because it is a smaller particle steroid that flows well around delicate structures. Kenalog (triamcinolone) is often used for joint injections in the knee, shoulder, or hip because it stays in the joint space and provides longer-lasting local relief. Betamethasone is used around tendons or in certain areas of the spine. The pain doctor's job is to pick the right steroid for the right job.
Where the Injection Goes Matters More Than the Name
The real difference between a "cortisone shot" your primary care doctor gives you in the knee and an epidural steroid injection is not the medication itself - it is the target.
Joint and soft tissue injections deliver steroid into a specific joint, bursa, or tendon. These treat conditions like arthritis, bursitis, and tendon inflammation. Some of these can be done in a primary care office, and some are done with ultrasound guidance for better accuracy.
Epidural steroid injections deliver steroid into the epidural space of the spine - the area around the spinal nerves. These treat conditions where a nerve is being compressed or irritated, like sciatica, disc herniations, spinal stenosis, and radiculopathy. Epidurals are performed by a pain specialist using fluoroscopy (live X-ray) to guide the needle to the exact location.
Types of Epidural Injections
There are several approaches, and the one your doctor recommends depends on your condition and anatomy:
Transforaminal epidural (TFESI) - Targets a single specific nerve root through the opening where it exits the spine. This is the most precise approach and is commonly used for sciatica and disc herniations.
Interlaminar epidural - Delivers medication into the central epidural space, providing broader coverage. Often used for spinal stenosis or conditions affecting multiple levels.
Caudal epidural - Enters the epidural space through the tailbone. Sometimes used for patients who have had prior spine surgery or who have anatomy that makes other approaches more difficult.
How Do I Know Which One I Need?
It depends on what is causing your pain. If your pain is in a joint - knee, shoulder, hip - a steroid injection into that joint is likely the right approach. If your pain involves the spine and is radiating into an arm or leg, an epidural is probably what you need.
But back pain is not always straightforward. It can come from the facet joints, discs, nerves, or the SI joint - and each one is treated with a different type of injection. A pain specialist evaluates your symptoms, reviews your imaging, and determines which structure is generating the pain before choosing the right approach.
Steroid Injections in Castle Rock
Dr. Carrera is double board-certified in interventional pain medicine and physical medicine and rehabilitation. The practice offers the full range of steroid injections - joint injections, epidurals, nerve blocks, and diagnostic injections - for patients from Castle Rock, Parker, Lone Tree, Highlands Ranch, Colorado Springs, and surrounding communities.
Have questions about which type of injection is right for you? Call 720-455-3775.
