Top 5 Causes of Sciatica & When to See a Chiropractor
The most common causes of sciatica are: (1) lumbar disc herniation, (2) piriformis syndrome, (3) SI joint dysfunction, (4) lumbar spinal stenosis, and (5) spondylolisthesis. Most cases improve with chiropractic care plus targeted rehab. See a chiropractor when pain lasts more than a week or limits daily activity. See an MD for red-flag symptoms like progressive weakness or bowel/bladder changes.
Written by Dr. Luis Arteaga, DC — a rehab-focused chiropractor at Ascenxion Rehab and Performance in San Antonio.
Table of Contents
What Sciatica Actually Is
The 5 Most Common Causes of Sciatica
Less Common (But Important) Causes
Symptom Patterns: How to Tell What's Causing Yours
When to See a Chiropractor for Sciatica
Red Flags — When to See an MD First
How a Chiropractor Treats Sciatica
What to Expect: Real Recovery Timelines
Frequently Asked Questions
What Sciatica Actually Is
Sciatica is not a diagnosis — it's a symptom. The term describes pain that radiates along the path of the sciatic nerve, which runs from the lower back through the hip and down the back of the leg. The pain can feel like burning, electric shock, deep aching, or numbness, depending on which level of the nerve is irritated.
According to the NIH, up to 40% of adults experience sciatica at some point. The good news: most cases resolve with conservative care — manipulation, exercise, and time — without surgery. The American College of Physicians 2017 guideline supports spinal manipulation and exercise as first-line non-drug care for low back pain with or without radiculopathy.
The 5 Most Common Causes of Sciatica
1. Lumbar Disc Herniation (Most Common)
Roughly 90% of sciatica cases are caused by a herniated lumbar disc — typically at L4–L5 or L5–S1. When the disc bulges or herniates, it can compress or chemically irritate the nerve root, producing radiating pain into the buttock and leg.
Telltale sign: Pain that worsens with sitting, coughing, or sneezing; relieved by standing or walking.
Evidence: A Cochrane review confirms most disc-related sciatica improves with conservative care within 6–12 weeks.
2. Piriformis Syndrome
The piriformis muscle sits deep in the buttock and runs near (or sometimes through) the sciatic nerve. When it spasms or shortens, it can compress the nerve and produce sciatic-pattern pain — without any spinal involvement.
Telltale sign: Pain centered in the buttock that worsens with sitting on hard surfaces or running.
Treatment: Targeted dry needling, manual therapy, and hip mobility work resolve most cases in 3–6 visits.
3. Sacroiliac (SI) Joint Dysfunction
The SI joint connects the spine to the pelvis. When it becomes restricted or inflamed, it can refer pain into the buttock and posterior thigh — mimicking sciatica.
Telltale sign: Pain localized to one side of the lower back/buttock that worsens with single-leg loading (climbing stairs, getting out of a car).
Treatment: Joint manipulation, mobilization, and posterior chain rehab. Our chiropractic rehab approach is built for this.
4. Lumbar Spinal Stenosis
Narrowing of the spinal canal — typically age-related — can compress nerve roots and cause sciatica, often bilateral.
Telltale sign: Pain that worsens with standing or walking and is relieved by sitting or leaning forward (the "shopping cart sign").
Treatment: Conservative care emphasizes flexion-biased mobility, glute and core strength, and decompression-style joint mobilization.
5. Spondylolisthesis
A vertebra slipping forward over the one below can pinch nerve roots and produce sciatica. Most common at L4–L5 or L5–S1.
Telltale sign: Low back pain with leg pain that worsens with extension (arching backward).
Treatment: Stability-focused rehab is the cornerstone. Manipulation is used cautiously and only at non-listhetic segments.
Less Common (But Important) Causes
Piriformis variant anatomy — about 17% of people have a sciatic nerve that pierces the piriformis itself
Pregnancy-related pelvic instability
Pelvic floor dysfunction
Tumors or cysts (rare — red flag if accompanied by night pain, weight loss)
Infection (rare — red flag if accompanied by fever)
Vascular causes (rare — claudication can mimic sciatica)
Symptom Patterns — How to Tell What's Causing Yours
Symptom
Most Likely Cause
Worse sitting, better standing/walking
Disc herniation
Centered in buttock, worse on hard chairs
Piriformis syndrome
One-sided low back, worse with stairs
SI joint dysfunction
Worse standing/walking, better sitting
Spinal stenosis
Worse with extension (back bends)
Spondylolisthesis
Bilateral, gradual onset
Stenosis or central canal pathology
This is a starting point — not a diagnosis. A proper physical exam with orthopedic testing is required to confirm the source.
When to See a Chiropractor for Sciatica
You should see a chiropractor if:
Pain has lasted more than 5–7 days
Pain is interfering with sleep, work, or daily activity
Over-the-counter measures (heat, NSAIDs, walking) aren't producing meaningful change
You want a non-surgical, non-pharmacological approach first
A rehab-focused chiropractor will assess, identify the root cause, treat with manipulation and soft tissue work as appropriate, and progress you through targeted rehab. Visit our sciatica & low back page for a deeper look at how we treat it.
Red Flags — When to See an MD First
Skip chiropractic and head to an MD or ER if you have:
Loss of bowel or bladder control (cauda equina syndrome — emergency)
Saddle anesthesia (numbness in groin/inner thighs)
Progressive limb weakness (foot drop, leg buckling)
Unexplained weight loss with back pain
Fever with back pain
History of cancer with new back/leg pain
Significant trauma (fall, motor vehicle collision)
A reputable chiropractor will screen for these before any treatment and refer immediately if present.
How a Chiropractor Treats Sciatica
At Ascenxion, the typical sciatica plan includes:
Comprehensive assessment — orthopedic testing, neuro exam, movement screen
Imaging review if you have prior MRIs/X-rays
Manipulation and mobilization of restricted segments
Dry needling for piriformis, glute med, and lumbar paraspinals as indicated
Nerve mobilization ("nerve flossing") to restore neural mobility
Progressive rehab — McKenzie protocols, deep core, hip strength
Re-test and discharge plan with a prevention block
The American College of Physicians supports this exact combination as first-line conservative care.
What to Expect — Real Recovery Timelines
Cause
Typical First Relief
Full Recovery
Piriformis syndrome
1–3 visits
3–6 weeks
SI joint dysfunction
2–4 visits
4–8 weeks
Disc herniation (uncomplicated)
3–6 visits
6–12 weeks
Spinal stenosis
4–8 visits
Ongoing management
Spondylolisthesis
3–6 visits
8–12 weeks
Outcomes depend on severity, age, and rehab adherence.
Frequently Asked Questions
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Lumbar disc herniation accounts for roughly 90% of sciatica cases — most often at L4–L5 or L5–S1.
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Many cases improve in 4–8 weeks on their own. Treatment typically shortens this and reduces recurrence rates.
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For uncomplicated sciatica, a chiropractor is appropriate first-line. For red-flag symptoms (weakness, bowel/bladder changes, trauma), see an MD first.
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Usually yes — gentle walking promotes circulation and disc health. Avoid prolonged sitting and heavy lifting during flare-ups.
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Yes, particularly for piriformis-driven and gluteal trigger-point cases. See our dry needling San Antonio page.
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If you experience loss of bowel/bladder control, saddle anesthesia, or progressive leg weakness — go to the ER immediately.
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Yes. Hip mobility, deep core strength, and load management (lifting, sitting hygiene) drastically reduce recurrence.
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Not initially. The ACP guidelines recommend imaging only after 4–6 weeks of failed conservative care, or sooner if red flags are present.
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No. Book online or call 210-887-7088.
Stop Guessing. Start Treating the Real Cause of Your Sciatica.
Book a 1-on-1 assessment with Dr. Arteaga. We'll identify the exact source of your sciatica and build a real plan to resolve it — not just mask it.