Spinal Injections in Napa, CA

What Are Spinal Injections?

Spinal injections are image-guided procedures that deliver medication directly into a specific area of the spine. The medication is usually a combination of a corticosteroid (to reduce inflammation) and a local anesthetic (to numb the area). The needle is placed under live X-ray, called fluoroscopy, so the medication reaches the exact target.

These procedures serve two purposes. The first is therapeutic: reducing inflammation and pain so patients can move, sleep, and return to physical therapy. The second is diagnostic: numbing a specific structure to confirm whether that structure is the actual source of pain. Sometimes one injection accomplishes both at once.

Spinal injections sit in the middle of the pain care continuum. Most patients reach this step after trying physical therapy, oral medication, activity changes, or home exercise without enough relief. Injections come before surgery and often help patients avoid it. Comprehensive interventional pain guidelines from major pain societies support image-guided spinal injections as evidence-based tools when patient selection is careful.

This page covers the six categories of spinal injections offered by our practice: epidural steroid injections, facet joint injections, medial branch blocks, sacroiliac joint injections, selective nerve root blocks, and diagnostic anesthetic blocks.

When Should You Consider a Spinal Injection?

A spinal injection is typically considered when several conditions line up. First, conservative care has been tried for at least six to twelve weeks without sufficient relief. Second, imaging or physical exam findings point to a likely pain generator: a disc, a facet joint, a sacroiliac joint, or a specific nerve root. Third, the pain limits work, sleep, exercise, or daily activities.

Conditions that commonly respond to spinal injections include:

•       Radicular pain such as sciatica caused by a herniated disc or pinched nerve [internal link: /services/sciatica]

•       Facet joint pain (back or neck pain that worsens with extension or rotation)

•       Sacroiliac joint dysfunction

•       Lumbar spinal stenosis with leg pain when walking [internal link: /services/spinal-stenosis]

•       Cervical radiculopathy with pain radiating into the shoulder or arm

There are also situations where a spinal injection is not the right answer. Generalized, body-wide pain without a clear structural target (such as a fibromyalgia pattern) usually does not respond. Active infection at the planned injection site, uncontrolled bleeding disorders, and certain blood-thinner regimens are reasons to delay or avoid the procedure. Pregnancy and certain medical conditions also require special consideration.

The honest framing patients hear during consultation: spinal injections work best for patients whose pain has a specific, identifiable structural source. Patient selection is the single biggest predictor of a good outcome.

Why Image Guidance Matters

Every spinal injection performed by our practice is done under live fluoroscopy at Valley Surgical Suites. Image guidance is not a luxury. It is the difference between medication reaching the target and medication going somewhere it does not help.

Live X-ray confirms three things during the procedure: the needle is in the correct position, the medication will spread to the intended structure, and there is no inadvertent placement into a blood vessel. Image guidance has been shown to improve needle placement accuracy across the major spinal injection types, particularly for epidural and facet procedures.

Without image guidance, “blind” injections done by feel alone miss the intended target a meaningful percentage of the time. A missed target means the medication never reaches the inflamed nerve or joint, and the patient does not get the relief the procedure was designed to deliver.

There is another reason image guidance matters: it allows us to deliver a targeted dose, not a system-wide flood. An oral steroid affects the whole body and brings whole-body side effects. A fluoroscopically guided spinal injection places a small, focused dose of steroid directly where it is needed, with much less spillover. Most patients tolerate this far better than oral steroid courses.

Before the steroid is delivered, a small amount of contrast dye is injected first. The contrast lights up under X-ray, showing exactly where the medication will spread. This step adds seconds to the procedure and protects against misplaced injection.

Types of Spinal Injections We Offer

Several distinct injection procedures fall under the spinal injection umbrella. Each suits a different anatomical structure and clinical question. The right choice depends on where the pain is coming from, what imaging shows, and what the goal of the injection is: relief, diagnosis, or both.

Epidural Steroid Injections (ESI)

An epidural steroid injection delivers a corticosteroid combined with a local anesthetic into the epidural space, the area just outside the protective sleeve around the spinal cord and nerve roots. The steroid reduces inflammation; the anesthetic provides immediate, short-term numbing.

Three approaches are used depending on the goal:

•       Transforaminal: the needle enters through the foramen (the bony window where the nerve root exits) to target a specific nerve.

•       Interlaminar: the needle enters between two vertebrae for broader medication spread across multiple levels.

•       Caudal: the needle enters through the sacral hiatus at the base of the spine, useful for lower lumbar and sacral nerve roots.

Epidural injections can be performed in the cervical, thoracic, or lumbar spine, depending on where the pain originates. Evidence supports lumbar epidural steroid injection for radicular pain when image guidance is used and the patient has confirmed nerve-root inflammation. For lumbar spinal stenosis specifically, the evidence is more mixed, and patients should expect modest, variable benefit rather than dramatic, lasting relief.

For patients curious about the deeper mechanics of this procedure, we have a related deep-dive on how epidural injections help with disc pain and sciatica.

Facet Joint Injections

Facet joints are the small paired joints connecting each vertebra to the one above and below. They guide spinal motion and bear load. When facet joints become arthritic, inflamed, or irritated, they generate axial pain in the back or neck, often worsened by extension or rotation.

A facet joint injection places a small dose of corticosteroid plus anesthetic directly into the facet joint or around its capsule. The procedure has both diagnostic and therapeutic value: a meaningful reduction in pain after the injection helps confirm the facet joint as the pain source. ASIPP facet joint intervention guidelines support image-guided facet procedures as part of a stepwise approach for chronic spinal pain.

When facet injections give partial or temporary relief, the next step is often a series of medial branch blocks followed by radiofrequency ablation. This pathway is part of the broader comprehensive pain management plan our practice builds around each patient.

Medial Branch Blocks

A medial branch block is an anesthetic injection placed near the medial branch nerves, the small nerves that carry pain signals from the facet joints to the brain. Unlike a facet joint injection, this procedure usually does not include steroid. Its role is primarily diagnostic.

If a medial branch block produces a clear, time-limited reduction in pain, that is strong evidence the facet joint is the pain source. Research on the diagnostic accuracy of medial branch blocks supports a two-block protocol, where two separate diagnostic blocks (often with different anesthetic durations) confirm the result before moving to longer-lasting treatment.

The two-block approach exists because facet pain can be patchy and false-positive responses do occur. Confirming with two blocks before committing to radiofrequency ablation protects patients from undergoing a procedure that would not help them.

Sacroiliac (SI) Joint Injections

The sacroiliac joint sits where the bottom of the spine (the sacrum) meets the pelvis. SI joint pain is common after pregnancy, after lumbar fusion (where the SI joint takes on extra load), and in some forms of arthritis. It typically presents as deep pain on one side of the lower back, sometimes radiating into the buttock or groin.

An SI joint injection delivers steroid and anesthetic directly into the joint capsule, performed under fluoroscopy or, in some cases, ultrasound guidance. The injection has dual value: image-guided SI joint needle placement is highly accurate, and the response to anesthetic confirms or rules out the SI joint as the pain source.

When SI joint injections give meaningful but short-lived relief, our practice can discuss longer-term options. Patients can read more about the broader treatment pathway on our sacroiliac joint dysfunction page.

Selective Nerve Root Blocks

A selective nerve root block targets a single nerve root with a small dose of anesthetic, often combined with low-dose steroid. The goal is precision: pinpointing which nerve root is producing the patient’s pain when imaging is ambiguous.

This procedure is most useful in three situations: multilevel disc disease where MRI shows several possible culprits, prior spine surgery that has changed the anatomy, and scoliosis or transitional anatomy that makes localization difficult. A clear, time-limited pain response after the block strongly suggests that specific nerve root is the source.

Selective nerve root blocks can also provide therapeutic relief, particularly for far-lateral disc herniations or foraminal stenosis where a transforaminal epidural is not the ideal approach.

Diagnostic and Anesthetic Blocks

Some spinal injections are designed purely to diagnose. An anesthetic-only block (no steroid) numbs a specific structure for a few hours and lets us watch what happens to the pain.

Think of a diagnostic block as a detective finding the source, not just silencing the alarm. If pain disappears completely while the anesthetic is active and returns as it wears off, that is strong evidence the numbed structure is the pain generator. This information shapes everything that comes next, from physical therapy focus to surgical referral to longer-term interventional plans.

Common diagnostic blocks include diagnostic SI joint blocks, diagnostic medial branch blocks (covered above), and diagnostic nerve root blocks. They are short, low-risk, and high-information.

What to Expect on Your Injection Day at Valley Surgical Suites

Most spinal injections are performed at Valley Surgical Suites, our outpatient surgery center. The full visit takes about one to two hours; the procedure itself is usually five to fifteen minutes.

Before the Procedure

•       Bring a current list of medications and allergies.

•       Blood thinners (aspirin, warfarin, Eliquis, Plavix, and others) often need to be paused. Follow the specific timing instructions from your physician.

•       Wear comfortable, loose clothing.

•       Arrange a driver if IV sedation is planned.

At the Surgery Center

•       Arrive 30 minutes early for check-in and IV placement.

•       Light sedation may be used for comfort, though many patients prefer only the local anesthetic.

•       The skin is numbed first; the needle is then advanced under live X-ray in a sterile fluoroscopy suite.

After the Procedure

•       Patients spend about 30 minutes in monitored recovery, then go home the same day.

•       Most return to light activity within 24 hours. Heavier activity, lifting, and exercise are usually paused for a day or two.

•       The local anesthetic gives immediate, short-lived relief. The steroid effect typically begins within two to seven days as inflammation settles. Outcomes vary by patient.

Call the office promptly if you notice severe new headache (especially one that worsens when standing), fever, swelling, or redness at the injection site, or new weakness, numbness, or loss of bladder or bowel control. These warning signs are uncommon but important. Most patients have a smooth recovery and return to normal activity quickly.

How Long Do Spinal Injections Last?

The honest answer is that response varies. Duration depends on the type of injection, the underlying condition, the patient’s overall health, and whether the injection is paired with physical therapy.

General ranges patients can expect:

•       The anesthetic component lasts hours. This is the immediate numbing felt right after the procedure, and it wears off the same day.

•       The steroid component, when present, typically provides relief lasting two weeks to six months. Some patients see substantially longer relief; others see partial or shorter-lived benefit.

Why does response vary so much? Acute inflammation tends to respond better than chronic structural damage. Patients whose pain has a clear, single structural source tend to do better than patients with diffuse or multi-source pain. Pairing the injection with targeted physical therapy and lifestyle changes meaningfully extends results in many cases.

Most physicians limit therapeutic steroid injections to three or four per year per region to avoid cumulative steroid side effects. Some patients get sustained relief from a single injection. Others use injections as a recurring tool within a comprehensive plan. Others find injections do not help and move on to different treatments. Spinal injections are a tool, not a guarantee, and we set realistic expectations together at the consultation.

Are Spinal Injections Painful?

Most patients report mild to no significant pain during the procedure. The skin at the entry point is numbed first with local anesthetic, similar to a dental injection. After that, patients typically feel pressure or brief tingling when the medication is delivered.

IV sedation is available for patients who feel anxious. Many patients choose to remain fully awake, especially for shorter procedures like a single facet block.

Mild post-injection soreness at the entry site is common for 24 to 48 hours. Some patients experience a temporary “steroid flare” for a few days before the steroid takes effect, which is normal and usually resolves on its own.

A small percentage of patients find the procedure uncomfortable, particularly without sedation and for cervical injections. Our team adjusts the approach, sedation level, and pacing based on each patient’s comfort.

Risks, Side Effects, and Limitations

Spinal injections are generally safe when performed under image guidance with sterile technique, but they are not risk-free. Honest risk discussion is part of every consultation.

Common, transient effects: soreness at the injection site for a day or two, a brief steroid flare, mild facial flushing, transient blood sugar elevation (relevant for patients with diabetes), one or two nights of insomnia, and brief mood changes.

Less common: vasovagal reaction (lightheadedness), mild water retention, and cumulative side effects from repeated steroid injections over the years.

Rare but serious: infection at the injection site (very rare with sterile technique), dural puncture leading to a spinal headache, bleeding or bruising (more relevant for patients on blood thinners), and nerve injury. The FDA Drug Safety Communication on epidural steroid injections describes rare neurologic events associated with cervical epidural steroid injections, which is why our practice uses fluoroscopy and current safety techniques on every cervical case. A comprehensive safety review of epidural steroid injections confirms that the most serious complications are uncommon when injections are performed under fluoroscopy with appropriate technique and patient selection.

Honest Framing of the Evidence

Evidence supports spinal injections for many patients with appropriate selection, though response varies. Some patients see substantial relief; others see partial or short-lived benefit. Spinal injections are most effective as one component of a comprehensive pain management plan, not as standalone solutions.

Major pain society guidelines support image-guided spinal injections when patient selection is careful and the procedure is part of a broader treatment plan. The evidence is strongest when there is a specific, identifiable structural target, and weakest when pain is diffuse, longstanding, and without a clear source.

Spinal injections are a useful clinical tool, not a miracle cure. Patients leave the consultation with an honest sense of what an injection can and cannot do for their specific case.

When Injections Aren’t Enough

Some patients get strong, durable relief from a single injection. Others get partial relief that helps but does not fully solve the problem. Others find injections do not help meaningfully. All three are common.

When an injection does not provide enough relief, several escalation paths exist:

•       A repeat injection using a different approach (for example, transforaminal after interlaminar) can sometimes succeed where the first did not.

•       Radiofrequency ablation, after positive medial branch blocks, can provide six to twelve months of relief for facet-mediated pain.

•       Spinal cord stimulation (SCS) is an option for patients with refractory radicular or neuropathic pain who have not improved with conservative care or injections. [Internal link: /services/spinal-cord-stimulation]

•       Surgical referral may be appropriate when imaging shows a clear surgical target and conservative care has been exhausted.

Patients who want a deeper read on this exact scenario can review our blog on what happens when an injection doesn’t work for sciatica.

The decision to escalate is always made together with the patient. There is no single right path, and the right next step depends on what the original injection revealed about the pain source.

Insurance and Cost

Most major insurance plans, including Medicare, cover medically necessary spinal injections. Prior authorization is often required, and our office handles the submission process for established patients.

Coverage typically depends on:

•       Documented conservative care (physical therapy, medication trial, time)

•       Imaging consistent with a treatable structural pain source

•       Appropriate diagnosis codes from the consultation visit

•       Procedure type and number of injections per region per year

Patients without insurance, or with out-of-network plans, can contact the office for cost information before scheduling. Note that Valley Surgical Suites and the practice may bill separately, and patients receive itemized statements from each. The front-office team is available to walk through expected costs in detail before the procedure.