Most people feel some soreness at the injection site for a day or two, and roughly one in five experiences a temporary flare of increased pain before the steroid kicks in. When relief does arrive, it tends to show up within the first few days for the majority of patients. But the full picture of what happens after a facet joint injection depends on why you got the shot in the first place, how your body responds to the steroid, and what your doctor plans to do with the information the injection provides.
The First Few Days
Right after the procedure, you’ll likely notice that the area around the injection feels numb. That’s the local anesthetic doing its job, and it typically wears off within a few hours. During that window, your pain may feel dramatically better, which can be encouraging but is not the long-term effect. Once the numbing agent fades, many people experience a return of their original pain or even a temporary increase. This “flare” period is one of the most common concerns, and it’s worth understanding what to expect.
A prospective study tracking 140 patients who received musculoskeletal corticosteroid injections found that about one in five reported a pain flare after the procedure. Among those who ultimately got relief, roughly 60% noticed improvement within three days, and over 90% had meaningful pain reduction within a week.1PubMed Central. Prospective Evaluation of Pain Flares and Time Until Pain Relief Following Musculoskeletal Corticosteroid Injections So if you’re still hurting on day two, that doesn’t mean the injection failed. Most physicians tell patients to give it a full week before drawing conclusions.
During this early window, you might also notice mild swelling, bruising, or warmth at the injection site. These are normal responses to having a needle placed into a small joint in the spine. Ice packs, over-the-counter pain relievers, and taking it easy for 24 to 48 hours are standard advice. Strenuous exercise and heavy lifting are typically discouraged for a day or two, though light walking is usually fine.
What Counts as a Good Response
Here’s where expectations often get tricky. Facet joint injections serve two distinct purposes, and what counts as “success” depends on which one your doctor is after. Some injections are diagnostic: the goal is to figure out whether the facet joint is actually the source of your pain. Others are therapeutic: the goal is to reduce inflammation and provide lasting relief. Many injections try to accomplish both at once.
For a diagnostic injection, even a few hours of significant pain relief while the local anesthetic is active can be the key finding. If numbing the facet joint eliminates your pain, that strongly suggests the joint is the culprit. Single diagnostic blocks do carry a meaningful false-positive rate, which is why controlled blocks (repeating the test with a different anesthetic) are considered more reliable.2Techniques in Regional Anesthesia and Pain Management. Medial branch blocks and facet joint injections as predictors of successful radiofrequency ablation If your doctor schedules a second injection a few weeks later using a different numbing agent, they’re trying to confirm the diagnosis before moving to a longer-lasting treatment.
For therapeutic injections, the steroid component is the main event. Corticosteroids reduce inflammation inside the joint, and the benefits typically build over several days to a couple of weeks. Multisociety consensus recommendations suggest that corticosteroid injected into the facet joint in patients with joint inflammation can relieve pain and improve function.3BMJ Journals. Multisociety multispecialty consensus recommendations on corticosteroid injections for facet joint and sacroiliac joint pain Exactly how much relief you get and how long it lasts varies widely from person to person.
How Long the Relief Typically Lasts
This is the question most people really want answered, and the honest answer is: it depends. Some patients get weeks of substantial relief. Others get months. A smaller group gets very little benefit at all. There’s no single number that captures the average experience because outcomes depend on factors like how inflamed the joint was, how much degeneration is present, and individual biology.
Clinical trials comparing facet joint steroid injections with other approaches offer some context. One randomized trial found that both steroid injections and radiofrequency denervation produced pain relief and functional improvement, with no significant difference between the two groups over the study period.4PubMed. A comparison of intraarticular lumbar facet joint steroid injections and lumbar facet joint radiofrequency denervation in the treatment of low back pain: a randomized, controlled, double-blind trial That’s somewhat reassuring if you’re starting with injections rather than jumping straight to a more invasive procedure.
A pilot study using a different injectable (hyaluronic acid) in patients with confirmed facet arthropathy tracked outcomes for a full year. Pain scores and disability measures improved significantly through the six-month mark but generally were not sustained at twelve months.5PubMed. Prospective pilot study of painful lumbar facet joint arthropathy after intra-articular injection of hylan G-F 20 While that study wasn’t using a standard steroid, it mirrors what many clinicians observe: facet joint injections tend to provide medium-term relief rather than a permanent fix. Repeat injections are common, though most doctors limit how frequently steroids are administered to avoid the cumulative effects of corticosteroids on local tissue.
Who Tends to Do Well and Who Doesn’t
Researchers have spent considerable effort trying to figure out which patients are most likely to benefit. A scoping review of the available evidence found that imaging signs of facet joint arthropathy (visible degeneration of the joint) were consistently linked to better outcomes after injection. Younger age and smoking, on the other hand, were frequently associated with poorer results.6PubMed Central. Predictors of outcomes following lumbar intra-articular facet joint injections and medial branch blocks: A scoping review
The younger-age finding might seem counterintuitive. After all, you’d expect someone with a younger, healthier body to heal better. But the likely explanation is that younger patients without clear joint degeneration may have pain coming from somewhere other than the facet joint itself. The injection targets the joint, so if the pain source is really a disc, a muscle, or a nerve root, the shot won’t do much regardless of the patient’s age.
An older study looking at specific clinical features found that patients whose pain was eased by movement tended to respond better to facet joint blocks. Interestingly, the degree of osteoarthritis visible on imaging was not a reliable predictor of relief in that study.7PubMed. Therapeutic efficacy of facet joint blocks This creates a bit of tension with the scoping review’s findings, and it reflects a real challenge in this field: predicting who will benefit from facet joint injections remains imprecise. Your doctor’s clinical judgment, combined with your response to the procedure, often matters more than any single imaging finding.
The Role of Psychology and Mindset
One factor that gets less attention than it deserves is how your psychological state before the injection affects your outcome. A study tracking pain recurrence after lumbar facet joint injections found that patients who scored higher on a measure of pain catastrophizing (a tendency to ruminate about pain, magnify its threat, and feel helpless about it) had dramatically higher rates of pain returning. The association was strong: a catastrophizing score above the study’s threshold was linked to roughly four times the risk of pain recurrence. Smoking showed an even larger effect in that study, though the confidence interval was wide due to the small number of smokers.8PubMed Central. Predictors of Pain Recurrence After Lumbar Facet Joint Injections
This doesn’t mean the pain is “in your head.” Chronic pain involves real changes in how the nervous system processes signals, and psychological patterns like catastrophizing can amplify those signals. What it does mean is that if you tend to worry intensely about your pain, addressing that tendency through cognitive behavioral therapy, mindfulness-based approaches, or other strategies could improve how well the injection works for you. Some pain management programs now incorporate psychological screening before procedures for exactly this reason.
Complications and Safety
Facet joint injections are generally considered low-risk procedures, but “low risk” is not “no risk.” A large retrospective study covering nearly 12,000 injection procedures found an overall adverse event rate of less than 1% per procedure. Procedure-related complications (as opposed to systemic drug side effects) occurred in roughly 0.07% of cases, and drug-related systemic events in about 0.15%.9PubMed. Intra-articular facet joint steroid injection-related adverse events encountered during 11,980 procedures All eight procedure-related complications in that study were classified as major, with seven involving infectious spondylitis (an infection of the spine). One patient died from an uncontrolled infection with infective endocarditis.
Severe infectious complications like septic arthritis, epidural abscess, and meningitis have been reported in the literature, though they remain rare.10PubMed Central. Generalized infection following facet joint injection -A case report- The risk is highest in patients with compromised immune systems or uncontrolled diabetes. Proper sterile technique and image guidance reduce infection risk substantially.
More common but less dangerous side effects from the steroid itself can include:
- Facial flushing: a warm, red feeling in the face that can last a day or two
- Temporary blood sugar spikes: relevant if you have diabetes, since corticosteroids raise glucose levels for several days after injection
- Insomnia: some people have trouble sleeping for a night or two
- Mood changes: mild irritability or restlessness that typically resolves quickly
These steroid-related effects are systemic, meaning they happen because some of the medication gets absorbed into the bloodstream. They’re usually mild and self-limiting, but they’re worth knowing about so you don’t worry unnecessarily if your face turns red or you can’t fall asleep the first night.
When Injections Lead to the Next Step
For many patients, facet joint injections are part of a decision-making process rather than a standalone treatment. If the injection confirms that the facet joint is the pain source (the diagnostic role) and provides meaningful but temporary relief (the therapeutic role), the next conversation is often about radiofrequency ablation. This procedure uses heat to disrupt the small nerves that transmit pain signals from the facet joint, and it typically provides longer-lasting relief than steroid injections alone.
A multicenter study compared outcomes of radiofrequency denervation in patients who had been selected using either medial branch blocks or intra-articular facet joint injections, requiring at least 50% pain relief from the diagnostic block before proceeding.11Regional Anesthesia & Pain Medicine. Medial Branch Blocks or Intra-Articular Injections as a Prognostic Tool Before Lumbar Facet Radiofrequency Denervation: A Multicenter, Case-Control Study Both selection methods are considered valid pathways to ablation, though medial branch blocks are more commonly used as the pre-ablation screening tool because they target the same nerves that radiofrequency ablation will ultimately treat.
If your injection provides good temporary relief but the pain returns after a few months, your doctor may suggest either repeating the injection or stepping up to radiofrequency ablation. The choice depends on how much relief you got, how long it lasted, your preferences, and your overall treatment plan. Some patients are content with periodic injections a few times a year; others want a longer-lasting solution.
Functional Improvements Beyond Pain Scores
Pain relief is the headline goal, but what most people actually care about is function: can you sit longer, walk farther, sleep better, go back to work? The evidence here is encouraging. Disability scores (measured by standardized questionnaires that track daily activities) tend to improve alongside pain scores after facet joint injections. A meta-analysis comparing facet joint injections to medial branch blocks found no significant difference in disability improvement between the two approaches at one, three, or six months.12Neurospine. Effectiveness of a Facet Joint Block Versus a Medial Branch Block in Spinal Pain Management: A Systematic Review and Meta-Analysis
A randomized trial found that medial branch blocks with local anesthetic resulted in improvement across multiple domains: pain, physical function, psychological status, and return to work rates.13PubMed. Effectiveness of lumbar facet joint nerve blocks in chronic low back pain: a randomized clinical trial This is consistent with what patients generally report: when the pain eases, the rest of life tends to improve with it. You move more, sleep more, and the cycle of deconditioning that chronic pain creates starts to reverse.
One practical note: the functional improvements don’t always track perfectly with the pain relief. Some patients report feeling “the same” on a pain scale but realize they’re doing activities they had given up. Others feel less pain but haven’t yet rebuilt the strength and endurance they lost while hurting. Physical therapy or a structured exercise program during the relief window can help you make the most of whatever benefit the injection provides.
What the Injections Cost
Cost varies widely depending on insurance, location, and whether the procedure is done in a hospital outpatient department or a freestanding clinic. A cost-utility analysis based on a randomized controlled trial estimated the direct cost per procedure at about $758, and the cost for a one-year improvement in quality of life at roughly $2,650 in direct costs. When indirect costs like lost work time were factored in, the estimate rose to about $4,430 per quality-adjusted life year gained.14Korean Journal of Pain. Therapeutic lumbar facet joint nerve blocks in the treatment of chronic low back pain: cost utility analysis based on a randomized controlled trial By the standards used in health economics, that’s considered cost-effective, especially compared to alternatives like surgery or long-term opioid use.
Out-of-pocket costs for patients with insurance typically range from a modest copay to several hundred dollars, depending on the plan. Without insurance, the procedure can run into the thousands when facility fees, imaging guidance, and physician charges are combined. If you’re facing multiple injections across several spinal levels, those costs add up, so it’s worth asking about bundled pricing and whether your insurer requires preauthorization.
Emerging Alternatives to Steroids
Standard facet joint injections use corticosteroids, but researchers have been exploring other injectables that might provide longer-lasting relief or avoid the systemic side effects of steroids. The most studied alternative is platelet-rich plasma (PRP), which uses concentrated growth factors from your own blood.
A systematic review found that PRP injected into facet joints led to better long-term pain relief and disability improvement compared to corticosteroids.15PubMed Central. Interventional Minimally Invasive Treatments for Chronic Low Back Pain Caused by Lumbar Facet Joint Syndrome: A Systematic Review A prospective study found that while both PRP and local anesthetics reduced pain initially, from about six weeks onward the PRP group showed significantly better pain scores, with the advantage persisting up to one year.16PubMed Central. Platelet Rich Plasma for the Therapy of the Lumbar Facet Joint Syndrome: A Prospective Study About CT-Guided Facet Joint Injections With PRP Compared to Local Anesthetics Another trial comparing PRP and steroid injections (both combined with radiofrequency ablation) found that steroids worked faster on day one but PRP provided superior pain relief and disability improvement at three and six months.17Journal of Orthopaedics, Trauma and Rehabilitation. Comparison of intra-articular lumbar facet joint injection of platelet-rich plasma and steroid in the treatment of chronic low back pain: A prospective study
Hyaluronic acid (the same substance used in knee injections for osteoarthritis) has also been tested in facet joints but has not demonstrated clear advantages over steroids in the available evidence. The same systematic review noted no significant difference between hyaluronic acid and corticosteroids for pain or satisfaction.15PubMed Central. Interventional Minimally Invasive Treatments for Chronic Low Back Pain Caused by Lumbar Facet Joint Syndrome: A Systematic Review
PRP is not yet widely covered by insurance for spinal injections, so the out-of-pocket cost tends to be higher. But for patients who can’t tolerate repeated steroid injections or who want a longer interval between procedures, the early data is intriguing. The studies so far are small, and larger trials are needed before PRP becomes a routine first-line option for facet joint pain. Still, if you’ve been through several steroid cycles with diminishing returns, it’s a conversation worth having with your pain specialist.
Why Facet Joints Are Such Common Pain Generators
Facet joints are small paired joints that sit at the back of each spinal segment, one on each side. They guide and limit movement of the spine, bearing load particularly during extension (arching backward) and rotation. Like any joint with cartilage and a capsule, they can develop arthritis, become inflamed, or get injured. They are recognized as a major source of both neck and low back pain.18Journal of Bone and Joint Surgery. Pain Generation in Lumbar and Cervical Facet Joints
The challenge with facet joint pain is that it mimics other common back problems. There’s no physical exam maneuver or imaging study that reliably distinguishes facet-mediated pain from disc-related pain or sacroiliac joint dysfunction. MRI can show arthritis in the facet joints, but plenty of people have arthritic-looking facets on imaging without any pain, and some people with severe facet pain have unremarkable imaging. This diagnostic uncertainty is exactly why the injections carry so much clinical value: the response to the injection is often more informative than the scan that preceded it.