Sciatica is one of the most recognizable pain patterns in the body, a sharp, burning, or electric sensation that travels from the lower back through the buttock and down one leg, sometimes reaching the foot. It stops people mid-stride, wakes them from sleep, and makes sitting in a car or at a desk almost unbearable.
What most patients do not realize is that sciatica is not a diagnosis in itself. It is a symptom. And the cause behind it determines everything about how it should be treated. The same leg pain in two different patients can have completely different origins and completely different treatment paths.
At Citrin Chiropractic in St. Louis, identifying the root cause of sciatic nerve pain is the first step of every sciatica assessment. Here are the five most common causes we see, how each one presents, and what treatment actually looks like for each.
| Sciatic nerve pain in St. Louis? Book a sciatica consultation same-day appointments available.Call (314) 890-2400 or book your free consultation online. |
What Is Sciatica and What It Is Not
The sciatic nerve is the longest and widest nerve in the human body. It originates from nerve roots at the L4, L5, S1, S2, and S3 levels of the lumbar spine, merges into a single nerve in the lower back, and travels through the buttock, down the back of each thigh, and into the foot.
When something compresses or irritates the sciatic nerve or the nerve roots that feed into it the result is the characteristic sciatic nerve pain that patients describe as electric, burning, shooting, or like a hot wire running down the leg. In most cases it affects only one side.
Important: Sciatica describes the symptom pattern, not the cause. Treating sciatica effectively requires identifying what is compressing or irritating the nerve because a herniated disc, piriformis syndrome, and spinal stenosis all produce similar symptoms but respond to completely different treatments.
The 5 Most Common Causes of Sciatica
Here is a detailed look at each cause, the distinctive symptoms that point toward it, and what treatment looks like at Citrin Chiropractic.
Cause 1: Herniated or Bulging Disc
A disc herniation at L4-L5 or L5-S1 is the most common cause of sciatica, accounting for roughly 90% of cases seen in clinical practice. When the soft inner core of a spinal disc pushes through its outer shell, it can press directly on the sciatic nerve root, producing the characteristic shooting pain down the leg.
The distinguishing feature of disc-related sciatica is that it tends to worsen with sitting and forward bending positions that increase disc pressure and improve with walking or lying down. Coughing, sneezing, or straining often produces a sharp spike of pain because these actions dramatically increase intradiscal pressure for a brief moment.
How we treat it: Non-surgical spinal decompression is the primary treatment for disc-related sciatica at Citrin. By creating negative intradiscal pressure, decompression draws the herniated material away from the nerve root and promotes disc healing. Chiropractic adjustment addresses the secondary joint dysfunction that develops around the herniated level.
Cause 2: Piriformis Syndrome
The piriformis is a small but powerful muscle deep in the buttock that rotates the hip outward. In roughly 17% of the population, the sciatic nerve passes directly through the piriformis muscle rather than beneath it. When the piriformis is tight, inflamed, or in spasm from prolonged sitting, overuse, or trauma it can compress the sciatic nerve directly.
The key distinction from disc-related sciatica: the pain is primarily in the buttock rather than the lower back, there is often a tender spot deep in the glute, and it typically worsens when sitting for long periods or crossing the affected leg over the other. Lower back pain may be absent entirely.
How we treat it: Soft tissue therapy targeting the piriformis muscle directly, combined with specific stretching protocols and chiropractic adjustment of the sacroiliac joint which is almost always involved when the piriformis is dysfunctional. Massage therapy is particularly effective for piriformis syndrome because the muscle responds well to direct manual release.
Cause 3: Spinal Stenosis
Spinal stenosis is a narrowing of the spinal canal or the foraminal openings through which nerve roots exit the spine. In the lumbar region, stenosis can compress the sciatic nerve roots as they exit, producing sciatica. Unlike disc herniation, lumbar stenosis is more common in patients over 50 and typically develops gradually from degenerative changes in bone spurs, thickened ligaments, and collapsed disc height narrowing the available space for the nerve.
Stenosis-related sciatica has a characteristic pattern: pain and leg weakness that comes on with walking or prolonged standing, and relieves with sitting or leaning forward. Patients often describe needing to stop and rest after walking a short distance. This pattern is called neurogenic claudication and points strongly toward stenosis as the cause.
How we treat it: Spinal decompression, flexion-distraction technique, and chiropractic care focused on maintaining available motion and reducing nerve irritation. Mild to moderate stenosis often responds well to conservative chiropractic care which we always recommend exhausting before surgery is considered.
Cause 4: Pregnancy-Related Sciatica
Sciatica is extremely common during the second and third trimesters of pregnancy, affecting up to 50% of pregnant women to some degree. The causes are multiple and often overlapping: the growing uterus can place direct pressure on the sciatic nerve, hormonal changes loosen the pelvic ligaments, and the shift in the body’s center of gravity places new mechanical stress on the lumbar spine and sacroiliac joints.
Pregnancy-related sciatica typically presents as pain deep in the buttock and down one leg, often worse when transitioning from sitting to standing or when walking. The challenge is that many standard sciatica treatments X-rays, certain positions, high-force adjustments are contraindicated during pregnancy.
How we treat it: Gentle chiropractic adjustment using pregnancy-safe techniques and a specialized pregnancy pillow that allows comfortable treatment at any stage. Prenatal massage from our licensed massage therapist Tanya addresses the piriformis and surrounding soft tissue without any contraindicated techniques. Many patients find significant relief within a few sessions.
Cause 5: Trauma and Car Accident Injuries
A car accident particularly a rear-end or side-impact collision can cause sciatica through several mechanisms simultaneously. The sudden compression and flexion forces involved in a collision can herniate a disc, jam sacroiliac joints, or cause significant muscle spasm in the piriformis and surrounding musculature. Sciatica from a car accident often develops 24 to 72 hours after the collision as inflammation builds.
Post-accident sciatica is particularly important to address early because the injury is often layered disc damage, joint displacement, and soft tissue injury all occurring together. Patients sometimes dismiss the leg pain as general soreness from the accident and delay treatment, allowing the disc herniation or sacroiliac dysfunction to worsen without intervention.
How we treat it: A full post-accident musculoskeletal evaluation to identify all contributing structures, followed by spinal decompression for any disc involvement, chiropractic adjustment, soft tissue therapy, and coordinated documentation for your insurance claim or personal injury attorney. Auto insurance MedPay and PIP typically cover sciatica treatment after a car accident we verify and bill directly.
How to Tell What Is Causing Your Sciatica
While only a clinical evaluation can confirm the diagnosis, these patterns are useful guides for how to tell what is causing your sciatica:
- Pain primarily in the buttock with no lower back pain, worse with prolonged sitting points toward piriformis syndrome
- Sharp lower back pain with shooting leg pain that worsens with sitting or coughing points toward herniated disc sciatica
- Leg heaviness or weakness when walking that relieves with sitting down points toward spinal stenosis
- Sciatica that developed during pregnancy usually piriformis or sacroiliac joint involvement
- Sciatica that started or worsened after a car accident post-traumatic, often multiple structures involved
In clinical practice, the causes frequently overlap. A patient with a mild disc herniation may develop piriformis syndrome as a compensatory pattern. A post-accident patient may have both sacroiliac dysfunction and early disc herniation at the same level. This is why a thorough assessment including orthopedic testing and imaging review is essential before treatment begins.
| Clinical note from Dr. Citrin: In over 45 years of practice, I have rarely seen sciatica with only one contributing factor. The disc, the joint, and the soft tissue almost always need to be addressed together. Our evaluation identifies all three so treatment addresses the whole picture not just the most obvious finding. |
Treatment Paths at Citrin Chiropractic
Once the cause of your sciatic nerve pain is identified, treatment at Citrin Chiropractic draws from a comprehensive set of clinical tools matched specifically to your cause and presentation.
Spinal Decompression
Our FDA-cleared spinal decompression table is the primary treatment for disc-related sciatica. By creating negative intradiscal pressure in a targeted, computer-controlled cycle, it draws herniated disc material away from the compressed nerve root and promotes the disc’s natural healing process. For patients who have been told they need surgery for a herniated disc causing sciatica, non-surgical spinal decompression is the evidence-supported alternative to pursue first.
Chiropractic Adjustment
Spinal adjustment addresses the joint dysfunction that almost always accompanies disc-related and post-accident sciatica. Misaligned vertebrae and sacroiliac joints contribute to nerve irritation and perpetuate pain cycles. Restoring normal joint mechanics reduces the mechanical load on the nerve root and allows surrounding soft tissue to begin healing.
Soft Tissue Therapy and Massage
For piriformis syndrome and post-accident sciatica, targeted soft tissue work, deep tissue massage, myofascial release, and trigger point therapy addresses the muscle and fascial components of sciatic nerve compression directly. Our licensed massage therapist Tanya works in coordination with our doctors so that soft tissue treatment is matched to your specific cause.
Active Rehabilitation
Progressive exercise prescription strengthens the stabilizing muscles of the lumbar spine and pelvis, reducing mechanical load on the structures compressing the sciatic nerve. Rehabilitation is introduced once acute inflammation has subsided and adjusted based on your ongoing progress.
On insurance: Sciatica treatment at Citrin is typically covered by health insurance, MedPay, PIP, and workers compensation depending on your situation. For post-accident sciatica, we handle all billing with your auto insurer directly. Call us and we will verify your coverage before your first appointment.
| Sciatic nerve pain in St. Louis? Call Citrin Chiropractic same-day evaluations available.Call (314) 890-2400 or book your free consultation online. |
Frequently Asked Questions
What is the most common cause of sciatica?
A herniated or bulging disc at L4-L5 or L5-S1 is the most common cause of sciatica, accounting for approximately 90% of clinical cases. The herniated disc presses on the sciatic nerve root, producing the characteristic shooting leg pain most patients associate with sciatica.
How do I know if my sciatica is from a disc or piriformis syndrome?
Disc-related sciatica tends to produce significant lower back pain alongside leg symptoms, worsens with sitting and forward bending, and may spike with coughing. Piriformis syndrome sciatica typically has minimal lower back pain, is localized deep in the buttock, and worsens with prolonged sitting or crossing the leg. A clinical orthopedic evaluation is the definitive way to differentiate them.
Can a car accident cause sciatica?
Yes and it is one of the most frequently missed post-accident injuries. The compression forces in a collision can herniate a disc, displace sacroiliac joints, or cause piriformis muscle spasm, all of which compress the sciatic nerve. Sciatica from a car accident often develops 24 to 72 hours after the collision and is covered by auto insurance MedPay or PIP in most cases.
Is sciatica during pregnancy dangerous?
Pregnancy-related sciatica is very common and not typically dangerous, but it does require treatment approaches specifically adapted for pregnancy. Chiropractic adjustments using pregnancy-safe techniques and prenatal massage can provide significant relief. We treat pregnant patients at all stages using appropriate positioning and techniques.
What is the best chiropractic treatment for sciatica?
The best treatment depends on the cause. For disc-related sciatica, spinal decompression therapy is the most effective non-surgical approach. For piriformis syndrome, soft tissue therapy and sacroiliac adjustment produce the best results. For stenosis, flexion-distraction and decompression help maintain mobility and reduce nerve irritation. A proper evaluation determines which applies to your specific presentation.
How long does sciatica take to heal with chiropractic care?
Recovery time depends on the cause and severity. Mild sciatic nerve pain from piriformis syndrome often responds within 4 to 6 weeks. Disc-related sciatica typically requires 8 to 16 weeks of consistent care. Starting treatment early before scar tissue and compensatory patterns become established produces significantly faster recovery.
