If your doctor has mentioned an injection to treat your back pain, you may have heard two terms that sound similar but are not interchangeable: facet joint injections and epidural steroid injections. Both are minimally invasive, both use anti-inflammatory medication, and both are performed under imaging guidance. They treat different spinal structures and are chosen for different reasons.
At Orange County Pain Clinics, we see patients every week who are unsure which type of injection matches their symptoms, and that confusion is understandable. The spine is a complex structure, and pain can originate from a joint, a nerve, a disc or a combination of all three. Understanding the difference between these two injections can help you have a more informed conversation with your provider and set realistic expectations for relief.
Why Location and Type of Pain Both Matter
Back pain is often treated as a single condition, but it rarely has a single cause. Two people with the same MRI findings can have completely different pain generators, one from joint inflammation and the other from nerve compression. That distinction determines which injection is likely to help.
Facet syndrome happens when the small stabilizing joints along the spine become inflamed or arthritic, producing localized, often achy pain that tends to worsen with extension or twisting. Radicular pain radiates outward along a nerve pathway, often described as sharp, burning or electric, and it usually stems from a compressed or irritated nerve root, which is the pain facet injections are not designed to treat.
What Is a Facet Joint Injection?
A facet joint injection delivers a mixture of anti-inflammatory steroid and anesthetic directly into one of the small joints that connect adjacent vertebrae and allow the spine to bend and twist. These joints can be found in the cervical, thoracic, or lumbar spine, and inflammation in any of these areas can radiate to the neck, shoulders, upper back, lower back, hips or buttocks, depending on the level involved.
During the procedure, contrast dye is used under fluoroscopic guidance to confirm accurate needle placement inside the joint capsule before the medication is delivered. Because facet joints are small, precise imaging is essential to good outcomes. Beyond providing relief, a facet joint injection also serves a diagnostic purpose: if a patient’s pain significantly improves after the injection, that response helps confirm the facet joint as the true source of the pain, which can guide further treatment decisions, including whether radiofrequency ablation may be a good long-term option.
What Is an Epidural Steroid Injection?
An epidural steroid injection delivers corticosteroid medication into the epidural space, the narrow area surrounding the spinal cord and nerve roots. Rather than targeting a joint, this injection is designed to reduce inflammation around an irritated or compressed nerve, which can produce radiating or radicular pain.
This type of pain is commonly linked to a herniated disc, spinal stenosis, or degenerative disc disease, and it frequently travels down the leg in a pattern associated with sciatica. At Orange County Pain Clinics, our physicians use fluoroscopic guidance for every epidural injection, and many are performed using a paramedian approach, entering the epidural space at a slight angle rather than straight through the midline. This technique tends to be more comfortable for patients with arthritic changes in the spine who find it painful to flex forward for a traditional approach.
Facet Joint Injections vs. Epidural Steroid Injections at a Glance
Choosing between these two treatments comes down to where your pain lives and what is causing it.
- The Type of Pain Guides the Treatment: Facet injections target localized, mechanical pain from an arthritic or irritated joint. Epidural injections target radiating nerve pain from compression or inflammation around a nerve root.
- The Injection Site Is Different: A facet injection is placed directly into the joint capsule. An epidural injection is placed into the space surrounding the spinal cord and nerve roots, outside the protective membrane.
- The Diagnostic Value Differs: A facet injection can help confirm whether the joint is truly the source of pain based on the patient’s response. An epidural injection is primarily therapeutic rather than diagnostic.
- Underlying Causes Often Differ: Facet injections are commonly used to treat facet syndrome and spinal arthritis. Epidural injections are more often used for herniated discs, spinal stenosis and degenerative disc disease.
- Recovery Expectations Are Similar: Both procedures are outpatient, take less than 30 minutes, and allow most patients to resume light activity within a day or two, though your physician will give you specific guidance based on your case.
It is also worth noting that these treatments are not always mutually exclusive. Some patients have both facet-mediated pain and nerve compression happening at the same time, and a thorough evaluation, including a review of your imaging and symptom pattern, is the only reliable way to know which injection, or combination of treatments, is right for you.
What the Research Shows
Facet joint pain is more common than many patients realize. Research using controlled diagnostic blocks has found that the lumbar facet joints are the source of pain in approximately 15% to 45% of patients with chronic low back pain, which places facet syndrome among the more frequently overlooked causes of ongoing discomfort. Given that low back pain affects an estimated 65% to 80% of adults in the United States at some point in their lives, that percentage represents a substantial number of people who may benefit from facet-targeted treatment rather than a generalized approach.
Epidural steroid injections have their own strong body of evidence, particularly for nerve-related pain from disc herniation. A systematic review of clinical trials found that 40% to 80% of patients experienced significant improvement in radiating leg pain and functional outcomes for periods ranging from three months to a full year following a course of one to four injections. Because individual results vary, our physicians walk every patient through what a realistic timeline and outcome may look like before moving forward with either procedure.
When an Injection Isn’t Enough: What Comes Next
Choosing the right injection is the first decision, not necessarily the last. If your pain is well-controlled after a facet joint injection or an epidural steroid injection, that response itself is useful information. It can confirm that your treatment plan is on the right track.
If a Facet Injection Confirms the Joint as the Source
A strong, if short-lived, response to a facet injection often points toward radiofrequency ablation. This treatment targets the same nerves that carry pain signals from that joint, but with results that tend to last considerably longer than those of a steroid injection alone.
If an Epidural Injection Provides Only Partial Relief
Our physicians may recommend a second, carefully spaced injection, or a shift toward a treatment that addresses the underlying structural cause, such as minimally invasive fusion or percutaneous disc decompression, for patients whose nerve compression is more significant.
If Neither Injection Type Fully Resolves Symptoms
For patients with chronic pain that persists despite injections, spinal cord stimulation may be worth exploring as a longer-term option.
Because Dr. Kajbaf and Dr. Iqbal treat both facet- and nerve-related pain under one roof, you stay with the same team even if your first injection is not the final answer. Your response to treatment becomes part of an ongoing plan, built and adjusted by the same team that performed your original procedure.
What Makes Orange County Pain Clinics Different
Getting the right diagnosis before an injection is just as important as the procedure itself, and that starts with the team behind your care. Our physicians include Dr. Jason Kajbaf, who is double board-certified in Physical Medicine & Rehabilitation and Pain Medicine, and Dr. Afzaal Iqbal, who is double board-certified in anesthesiology and pain medicine. Rather than defaulting to a single treatment path, our team evaluates your imaging, symptom pattern and treatment history to determine whether a facet joint injection, an epidural steroid injection, or another approach entirely is the most appropriate next step.
We also take an integrative view of pain management. Our chiropractic services and physical therapy team work alongside our injection specialists so that any relief you gain from a procedure can be reinforced with movement-based care, rather than treated as a stand-alone fix. Every injection at our practice is performed using fluoroscopic (X-ray) guidance to help ensure accurate placement and consistent results. We also offer same-week consultations at our Lake Forest, Mission Viejo and Irvine locations.
Find the Right Injection For Your Pain in Orange County
If you are dealing with back, neck or joint pain and are not sure whether a facet joint injection or an epidural steroid injection is the right fit, our team can help you find out. At Orange County Pain Clinics, we accept most PPO insurance plans and Medicare, and we offer same-week consultations at our Lake Forest, Mission Viejo and Irvine offices. Call us at 949-988-0505 or book online to schedule a consultation and get a clear answer about which treatment matches your specific pain.