Sciatica

Accurate Diagnosis First. Targeted Treatment Second.

“Sciatica” is one of the most common pain complaints we see—and one of the most commonly
misdiagnosed. The word describes a symptom, not a disease: pain that radiates from the lower back or
buttock down the back or side of the leg, often along the path of the sciatic nerve. But a wide range of
conditions can produce that same pattern, and many of them have nothing to do with the sciatic nerve
itself.

Treating “sciatica” without knowing the actual source is one of the most common reasons patients end up
frustrated with care, undergoing injections or even surgeries that don’t fix the problem. At Pain &
Vascular, our priority is to identify exactly what is generating your pain before we plan how to treat it.

What Is the Sciatic Nerve?

The sciatic nerve is the largest nerve in the body, formed by the L4 through S3 nerve roots. It exits the
pelvis, passes near the piriformis muscle, and travels down the back of the thigh before dividing just above
the knee into the tibial and common peroneal (fibular) nerves, which continue to the foot.

True sciatica refers to irritation or compression of the sciatic nerve itself or—more commonly—of the
lumbar or sacral nerve roots that form it. The classic presentation includes pain that radiates from the
lower back or buttock down one leg in a specific nerve distribution; pain that may be sharp, burning,
electric, or shooting; numbness, tingling, or weakness in the affected leg; and symptoms that often worsen
with sitting, coughing, sneezing, or bending forward.

Common Causes of True Sciatica

Lumbar disc herniation is by far the most common cause. A herniated or bulging disc—most often at
L4–L5 or L5–S1—presses on or chemically irritates a nearby nerve root, producing radiating pain in that
nerve’s distribution.

Lumbar spinal stenosis is age-related narrowing of the spinal canal that compresses the nerves within.
It typically produces “neurogenic claudication”—leg pain that worsens with standing or walking and
improves with sitting or leaning forward. Foraminal and lateral recess stenosis are more focal variants
in which a single nerve root is pinched as it exits the spine, often producing classic sciatica without
significant central canal narrowing.

Spondylolisthesis—forward or backward slippage of one vertebra over another—can compress nerve
roots and trigger sciatic symptoms. Degenerative disc disease, facet arthropathy, and synovial cysts
can each contribute, often in combination, by narrowing the space available for the nerves.

Serious “red-flag” causes are uncommon but important. Tumors, epidural abscess or hematoma,
vertebral fractures, and inflammatory or infectious processes can all present with sciatic-type pain and
require prompt recognition. Any sciatica accompanied by fever, unexplained weight loss, a history of
cancer, recent significant trauma, severe night pain, or new bowel/bladder dysfunction warrants urgent
evaluation.

Why Accurate Diagnosis Matters

The single biggest predictor of a good treatment outcome is an accurate diagnosis—and sciatica is one of
the conditions where this is most often overlooked.

An MRI showing a disc herniation doesn’t automatically mean the disc is causing your pain; bulges and
herniations are extremely common on imaging in people with no leg pain at all. Treating the picture
instead of the patient is a frequent path to disappointment. The leg pain pattern itself can also be
misleading, since pain referred from the sacroiliac joint, the hip, or the gluteal musculature can closely
mimic a true L5 or S1 radiculopathy.

When treatment fails, it’s often because the target was wrong. An epidural steroid injection won’t relieve
pain that’s actually coming from the SI joint. SI joint therapy won’t relieve pain that’s actually coming
from a herniated disc. And some mimics—like vascular claudication from peripheral artery disease—
require entirely different management. A careful history, focused physical examination, targeted imaging,
and, when indicated, diagnostic injections are how we identify the real source of pain before committing
to a treatment plan.

Conditions That Commonly Mimic Sciatica

Patients are often surprised to learn how many other conditions can produce leg pain that feels exactly
like sciatica. These are some of the most common ones we evaluate for and rule in or out:

Sacroiliac (SI) Joint Dysfunction and Sacroiliitis

The SI joint, where the sacrum meets the pelvis, is a frequent source of buttock and leg pain. SI joint pain
often radiates into the back of the thigh and occasionally below the knee, mimicking radiculopathy. It is
particularly common after pregnancy, trauma, lumbar fusion surgery, or in inflammatory conditions like
ankylosing spondylitis. Targeted physical exam maneuvers and diagnostic SI joint injections are key to
confirming the diagnosis.

Piriformis Syndrome and Deep Gluteal Syndrome

The piriformis muscle sits directly over (and in some people, around) the sciatic nerve as it exits the
pelvis. Spasm, scarring, or anatomic variations can irritate the nerve at this level, producing buttock and
leg pain that mimics lumbar radiculopathy but does not respond to spine-directed treatment. “Deep
gluteal syndrome” is a broader term that includes other causes of sciatic nerve entrapment in the gluteal
region.

Hip Joint Pathology

Hip osteoarthritis, labral tears, femoroacetabular impingement, and avascular necrosis of the femoral
head can all produce groin, buttock, and thigh pain that is easily mistaken for sciatica. A focused hip
examination and, when needed, a diagnostic intra-articular hip injection can clarify the source.

Greater Trochanteric Pain Syndrome

Often labeled “trochanteric bursitis,” this is now understood to involve the gluteal tendons and
surrounding soft tissues. It produces lateral hip and thigh pain that can radiate down the leg.

Peripheral Nerve Entrapments

Nerves can be compressed or irritated well outside the spine. Common examples include:

• Common peroneal (fibular) nerve entrapment at the fibular head, producing pain, numbness, or weakness in the lateral leg and dorsum of the foot—often mistaken for an L5 radiculopathy
• Tarsal tunnel syndrome, where the tibial nerve is compressed at the ankle, producing foot and arch pain that can be confused with an S1 radiculopathy
• Meralgia paresthetica, entrapment of the lateral femoral cutaneous nerve at the inguinal ligament, producing burning numbness on the outer thigh
• Cluneal nerve entrapment, producing buttock pain that radiates into the posterior thigh
• Pudendal neuralgia, producing perineal and posterior thigh pain

Lumbar Plexopathy

Inflammation, injury, or compression of the lumbar plexus within the pelvis or retroperitoneum can mimic
radicular pain but originates outside the spinal canal. Causes include diabetes (diabetic amyotrophy),
hematoma, tumor, and post-surgical changes.

Vascular Claudication from Peripheral Artery Disease

This is one of the most important mimics to recognize. Narrowing of the arteries to the legs—peripheral
artery disease (PAD)—can produce leg pain that comes on with walking and is relieved by rest. It often
looks remarkably like neurogenic claudication from spinal stenosis, but the underlying problem is reduced
blood flow, not nerve compression. Pulse examination, ankle-brachial index (ABI) testing, and vascular
imaging are essential when this is in the differential. As a combined pain and vascular practice, evaluating
this overlap is a particular focus of ours.

Myofascial Pain and Referred Pain

Trigger points in the gluteal, piriformis, and quadratus lumborum musculature can refer pain into patterns
that closely resemble sciatica without any underlying nerve compression.

Other Considerations

Herpes zoster (shingles) before the rash appears, retroperitoneal pathology, pelvic tumors, and
endometriosis can all occasionally present with leg pain that initially looks like sciatica.

How We Make the Diagnosis

Our diagnostic process is built around a single question: what is actually generating your pain? The
workup typically includes a detailed history; a focused physical examination with neurologic testing,
provocative SI joint and hip maneuvers, and—when indicated—pulse and vascular examination; and
review of prior imaging in the context of your symptoms rather than in isolation. Depending on findings,
we may order targeted imaging (lumbar spine, hip, or pelvic MRI), electrodiagnostic studies (EMG/NCS)
when peripheral nerve entrapment is suspected, or vascular studies such as ABI or arterial duplex when
claudication is in the differential. When the source remains uncertain, precisely targeted diagnostic
injections are often the single most reliable way to confirm or exclude a pain generator. The goal is a
confident diagnosis before any treatment plan is finalized.

Treatment Options

Once the actual source of pain is identified, treatment is tailored accordingly. The following is a general
overview; your specific plan depends on the diagnosis, severity, duration, and your individual goals.

Conservative Care

For most patients with newly diagnosed sciatica, conservative care is the appropriate first step. This
typically includes physical therapy with an emphasis on directional preference exercises, core
stabilization, hip and gluteal strengthening, and nerve mobilization; activity modification that avoids
consistent aggravators while staying as active as tolerated; and medications such as NSAIDs, neuropathic
agents (gabapentin or pregabalin), short courses of muscle relaxants for spasm, and—in selected acute
cases—oral corticosteroids. Heat, ice, and topical agents can serve as helpful adjuncts. Most cases of
acute disc-related sciatica improve substantially within 6 to 12 weeks of conservative care.

Interventional Pain Management

When conservative care isn’t enough—or when a specific pain generator has been identified—targeted
procedures can provide both diagnostic clarity and therapeutic relief.

• Epidural steroid injections (transforaminal, interlaminar, or caudal approach) deliver anti- inflammatory medication near the affected nerve root for disc-related radiculopathy
• Selective nerve root blocks can confirm which nerve root is generating pain and provide relief
• Sacroiliac joint injections, both diagnostic and therapeutic, for confirmed SI joint pain
• Radiofrequency ablation of the sacroiliac joint or medial branches of the facet joints, for appropriately selected patients
• Piriformis injections when piriformis syndrome is the diagnosis
• Peripheral nerve blocks and hydrodissection for peripheral nerve entrapments
• Hip joint injections when intra-articular hip pathology is contributing
• Spinal cord stimulation or dorsal root ganglion (DRG) stimulation for select patients with chronic, treatment-resistant neuropathic leg pain

Vascular Interventions for Peripheral Artery Disease

When leg pain is driven by impaired arterial blood flow rather than a spinal or nerve problem, treatment shifts entirely. Peripheral artery disease (PAD) most often presents as intermittent claudication— cramping or aching in the calf, thigh, or buttock that comes on with walking and resolves with rest—and can progress to rest pain, non-healing wounds, or tissue loss if left untreated.

Our practice offers the full spectrum of minimally invasive endovascular care for PAD, which means the vast majority of our patients are treated successfully without ever needing open bypass surgery. Procedures are performed in our outpatient angiography suite through a small puncture in the groin or wrist, under local anesthesia and light sedation—no major incisions, no general anesthesia, and patients typically go home the same day. Available techniques include diagnostic angiography to map the disease in real time, balloon angioplasty, bare-metal and drug-elutingstenting, atherectomy, and drug- coated balloons. The right combination is selected based on the location, length, and character of the disease.

Risk factor modification—smoking cessation, statins, antiplatelet therapy, control of diabetes and blood
pressure, and a structured walking program—remains foundational for every PAD patient and is built into
every treatment plan. Open surgical bypass is reserved for the small subset of patients with extensive
disease not suitable for an endovascular approach; when that level of care is needed, we coordinate with
trusted vascular surgical colleagues.

Surgical Consultation

Surgical evaluation is appropriate for patients with:

• Progressive neurologic deficits (significant or worsening weakness)
• Cauda equina syndrome (an emergency—bowel or bladder dysfunction, saddle anesthesia)
• Persistent, disabling radiculopathy that has not responded to a thorough course of non-surgical care and has a clear, surgically correctable structural cause

When surgical consultation is appropriate, we coordinate with spine surgeons we trust to make sure you
get the right opinion at the right time.

Red Flags: When to Seek Immediate Care

Most sciatica is not dangerous, but certain features warrant urgent or emergent evaluation:

• Loss of bowel or bladder control
• Numbness in the groin or inner thighs (“saddle anesthesia”)
• Rapidly progressive leg weakness
• Sciatica accompanied by fever, unexplained weight loss, or a history of cancer
• Severe pain following major trauma
• Pain that is dramatically worse at night or unrelieved by any position

If you have any of these symptoms, please seek emergency care immediately.

Why Choose Pain & Vascular for Sciatica?

What distinguishes our approach is a commitment to diagnostic accuracy before treatment. We combine:

• Deep expertise in interventional pain medicine and spine-related conditions
• A unique pain-and-vascular perspective that ensures vascular causes of leg pain are not overlooked
• A full range of diagnostic tools—from comprehensive examination through advanced imaging and precision diagnostic injections
• The full spectrum of treatment options, from conservative care through advanced interventional procedures and neuromodulation
• Coordinated referrals to surgical and other specialty colleagues when that’s the right next step

If you’ve been struggling with sciatica—especially if previous treatments haven’t helped—we welcome the
opportunity to take a fresh, careful look.