Sciatica or piriformis syndrome? Why the distinction matters for your treatment

People often use “sciatica” to describe any pain that travels from the buttock into the leg. Lumbar nerve-root irritation and deep gluteal conditions can overlap in how they feel, but their assessment and treatment may differ.

Getting the distinction wrong is one of the most common reasons that “sciatica treatment” fails.

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What sciatica actually is

Sciatica is a symptom, not a diagnosis. It describes pain that follows the path of the sciatic nerve — from the lower back through the buttock and down the leg, sometimes as far as the foot.

Lumbar radicular pain can involve irritation or compression of a nerve root in the lumbar spine. Possible contributors include:

• Disc herniation — the soft material inside a spinal disc pushes out and presses on a nerve root (most commonly L4, L5, or S1)
• Foraminal stenosis — narrowing of the opening through which the nerve root exits the spine
• Changes around the facet joint or foramen — these can narrow the space around an exiting nerve root
• Spinal stenosis — generalised narrowing of the spinal canal, more common in older patients

These presentations can overlap, so the examination looks for a consistent pattern rather than relying on one symptom or test.

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What piriformis syndrome actually is

Deep gluteal syndrome describes irritation of the sciatic nerve outside the spine. The piriformis is one possible structure in this region, but it is not the only one.

Symptoms may include deep buttock pain and pain that travels down the leg, sometimes resembling lumbar nerve-root symptoms.

“Dr. Devon Savarimuthu, DC, CSCS, says: ‘Leg pain needs an examination. I compare the lumbar spine, hip, neurological findings, and the positions that reproduce the symptoms before deciding what the plan should target.’”

The distinction matters because:

• A deep gluteal presentation may not respond to a lumbar-only plan
• Lumbar nerve-root symptoms may not respond to stretching the piriformis
• Treating piriformis syndrome as a disc problem can make symptoms worse
• Treating a disc herniation as a piriformis problem delays appropriate care

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How to tell the difference clinically

Neither a patient nor a general practitioner can reliably distinguish these two conditions based on symptom description alone. It requires a clinical examination with specific provocation testing.

Signs that can support lumbar nerve-root involvement:

• Pain that changes with lumbar flexion or extension (disc herniations typically worsen with sitting/flexion; stenosis worsens with extension/walking)
• Positive straight leg raise test — sciatic nerve tension test that reproduces leg pain with the leg at less than 60 degrees
• Numbness or tingling in a specific strip of skin — this points to which nerve root level is compressed
• Weakness in foot or ankle dorsiflexion (L4/L5 involvement)
• Central back pain that radiates into the leg

Signs that can support a deep gluteal presentation:

• Deep buttock pain as the primary complaint, with referred pain down the leg
• Pain that worsens with prolonged sitting — specifically with the hip flexed and internally rotated (sitting with legs crossed tends to aggravate it)
• Positive FAIR test — Flexion, Adduction, Internal Rotation of the hip reproduces the deep gluteal pain and referral
• Positive PACE test — resisted hip abduction and external rotation in a seated position
• Pain at the greater sciatic notch on palpation
• No change with lumbar loading positions

Research on the prevalence of piriformis syndrome as a cause of sciatica-like symptoms suggests it may account for a small but clinically important share of cases, and it is easy to miss when the exam jumps straight to the lumbar spine. (Hopayian et al., PM&R, 2019)

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When imaging is needed — and when it isn’t

Imaging can help when it is likely to change management, particularly with progressive neurological loss, serious-pathology concerns, or specialist planning. It is not routinely needed for every episode of low-back or leg pain.

However, MRI findings and symptoms are often poorly correlated. A 2015 study in the American Journal of Neuroradiology found disc bulges in approximately 50% of asymptomatic patients over 40. (AJNR, Jensen et al.) An incidental finding on an MRI doesn’t mean it’s causing your pain.

For piriformis syndrome specifically, standard lumbar MRI will usually be unremarkable — which is one reason it’s frequently missed when imaging is ordered before a clinical examination.

The clinical examination should drive the imaging decision — not the other way around.

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The Endura approach to sciatica and piriformis syndrome

The first visit compares lumbar, hip, and neurological findings and screens for reasons to refer. You leave with:

• A working diagnosis — not “sciatica” as a catch-all
• A written treatment plan targeting the correct structure
• Clarity on whether imaging is needed before treatment begins
• A baseline measure and a plan for reassessment

If it’s piriformis syndrome, treatment targets the piriformis and the deep hip muscles — not the lumbar spine. If it’s true nerve root compression, the plan targets the specific lumbar structure that’s involved with the right approach for that finding.

If the case requires specialist input — neurology, orthopaedics, or pain management — I’ll tell you at the assessment and help you navigate the next step.

Start with a 50-minute first visit that includes assessment and treatment.

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Related reading

• Sciatica treatment at Endura
• The Endura Method
• What actually happens at your first visit

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Book Your First Visit — (647) 951-5841 You’ll speak directly with Dr. Devon — not a receptionist.

→ Sciatica at Endura → About the Endura Method

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Dr. Devon Savarimuthu, DC, CSCS practises at Endura Chiropractic, 3440 Yonge St, Lawrence Park, Toronto. Doctor of Chiropractic, Palmer College. CSCS since 2015.