Pinched Nerve in the Spine: Causes, Symptoms, and How a Toronto Chiropractor Can Help

By Dr. Matthew Hannikainen DC — The Well Adjusted Chiropractic Centre, Toronto

"Pinched nerve" is one of those terms patients use to describe a wide range of symptoms — but when it comes to the spine, it has a specific clinical meaning that's worth understanding clearly. Because how you treat a pinched nerve depends entirely on what is doing the pinching, where it's happening, and why.

At our downtown Toronto clinic, spinal nerve compression is one of the most common presentations we assess and treat. This article explains what a spinal pinched nerve actually is, the structural causes behind it, what it feels like, and how a CBP-based chiropractic approach addresses the root cause rather than just the symptoms.

What is a spinal pinched nerve?

Your spinal cord runs through the vertebral canal, and at each spinal level a pair of nerve roots exits through openings called intervertebral foramina — one on each side. These nerve roots carry both motor signals (from the brain to the muscles) and sensory signals (from the body back to the brain).

A spinal pinched nerve — more precisely called radiculopathy — occurs when one of these nerve roots is compressed or irritated as it exits the spine. The compression changes how the nerve functions: it may fire abnormally (producing pain, tingling, or burning), conduct signals poorly (producing numbness or weakness), or both simultaneously.

The location of the compression determines where the symptoms are felt. A pinched nerve in the cervical spine (neck) produces symptoms into the shoulder, arm, or hand. A pinched nerve in the lumbar spine (lower back) produces symptoms into the buttock, leg, or foot — the pattern most people recognize as sciatica.

What causes a pinched nerve in the spine?

Disc herniation

The most common cause of acute nerve root compression. When the nucleus of a spinal disc pushes through the annulus and contacts a nerve root, the result is typically sharp, radiating pain that follows the path of that nerve. Lumbar disc herniation most commonly affects the L4, L5, or S1 nerve roots. Cervical disc herniation most commonly affects C5, C6, or C7.

The structural environment that allows a disc to herniate — loss of normal spinal curve, uneven disc loading, postural strain over time — is what we assess and address at our clinic beyond simply treating the acute symptoms.

Foraminal stenosis

The intervertebral foramina through which nerve roots exit can narrow due to disc height loss, facet joint arthritis, or bone spur formation. This gradual narrowing compresses the nerve root chronically rather than acutely. Foraminal stenosis tends to produce symptoms that build over time rather than appearing suddenly, and often worsens with spinal extension.

Vertebral subluxation

A spinal segment that has lost its normal position or movement can reduce the available space at the foramen and create mechanical irritation of the adjacent nerve root — even without disc herniation or significant stenosis. This is one of the most common findings in patients who present with nerve-type symptoms but have unremarkable imaging.

Spondylolisthesis

When a vertebra slips forward relative to the one below it, the foraminal geometry at that level is significantly altered. The nerve root that exits at that level can become chronically compressed or kinked. L5 is the most commonly affected level for spondylolisthesis-related nerve compression.

Spinal canal stenosis

Central stenosis — narrowing of the spinal canal itself — can compress multiple nerve roots simultaneously, particularly in the lumbar spine. The classic presentation is neurogenic claudication: leg symptoms that worsen with walking and improve with sitting or forward flexion.

Symptoms of a spinal pinched nerve

Symptoms vary depending on which nerve root is affected and the nature of the compression. Common presentations include:

Radiating pain — sharp, burning, or aching pain that travels from the spine into the arm or leg following a specific nerve pathway. This is the most recognizable symptom and often the one that finally brings patients to our Toronto clinic.

Numbness and altered sensation — a dermatomal pattern of reduced sensation, tingling, or pins and needles in a specific region of the arm, hand, leg, or foot. The specific region affected helps identify which nerve root is involved.

Muscle weakness — motor fibres within the compressed nerve root can be affected, producing weakness in specific muscles supplied by that nerve. In the cervical spine this might appear as grip weakness or difficulty raising the arm. In the lumbar spine it may affect foot dorsiflexion or knee extension.

Reflex changes — nerve root compression often reduces or eliminates the reflex associated with that nerve level. Reduced bicep reflex suggests C5-C6 involvement; reduced knee jerk suggests L3-L4; reduced ankle jerk suggests S1.

Local spinal pain — most patients with nerve root compression also have local pain at the spinal level of compression, though some present with predominantly referred symptoms and minimal local pain.

Why accurate assessment matters before treatment

Not all radiating arm or leg pain is a spinal pinched nerve. Peripheral nerve entrapment (carpal tunnel, cubital tunnel, thoracic outlet), vascular conditions, and referred pain from joints and muscles can all produce symptoms that resemble radiculopathy. Treatment directed at the wrong structure won't help — and in some cases can aggravate the actual problem.

At The Well Adjusted Chiropractic Centre, we begin every new patient with a thorough orthopedic and neurological examination — assessing reflexes, dermatomal sensation, muscle strength, and specific provocative tests that help identify which nerve root is involved and what is compressing it. Where clinically indicated, we refer for imaging to confirm the structural diagnosis.

This assessment process is what separates a care plan that addresses the actual cause from one that treats symptoms and hopes for the best.

How CBP-based chiropractic care addresses spinal nerve compression

Structural X-ray analysis

For spinal nerve compression, understanding the structural environment is essential. We refer for weight-bearing X-rays that allow us to measure spinal curves, identify foraminal narrowing patterns, detect spondylolisthesis, and assess the overall mechanical context in which the compression is occurring. This measurement drives everything that follows.

Corrective chiropractic adjustments

Chiropractic adjustments restore normal segmental motion and alignment — reducing the mechanical component of nerve root irritation. In the CBP approach, adjustments are directional and specific: aimed at restoring the spinal curve pattern that opens the foramina and reduces compressive loading on the affected nerve root.

For acute disc herniation with significant nerve compression, early care focuses on reducing inflammation and restoring segmental mobility. As the acute phase resolves, corrective work begins on the underlying structural pattern that allowed the herniation to occur.

Spinal decompression and traction

Specific traction protocols can reduce intradiscal pressure and create a decompressive effect at the affected level — drawing herniated disc material away from the nerve root and improving the mechanical environment. At our clinic, traction protocols are prescribed based on the specific structural findings on X-ray rather than applied generically.

Rehabilitation and stabilization

Core and spinal stabilization exercises support the structural correction achieved through adjustments and traction. These are prescribed individually based on examination findings — the specific pattern of muscle weakness and postural imbalance varies from patient to patient, and a generic exercise program is rarely optimal.

Collaboration when needed

Not all spinal nerve compression responds fully to conservative chiropractic care. Severe neurological deficits — significant and progressive muscle weakness, loss of bladder or bowel control, or signs of spinal cord compression — require prompt referral to a spine specialist. We assess for these findings at every visit and co-manage complex cases appropriately.

What to expect from care

For disc-related nerve compression without severe neurological deficit, most patients experience meaningful symptom reduction within 4-8 weeks of consistent care. Full structural correction — restoring the underlying spinal pattern that allowed the compression to develop — takes longer and is the focus of a complete correction program.

Realistic expectations are important. A nerve root that has been compressed for months may take time to fully recover even after the compressive force is removed. Numbness and weakness often resolve more slowly than pain. Progress is tracked at each visit so you always know where you stand.

When to seek assessment for a pinched nerve in Toronto

Seek a chiropractic assessment if you are experiencing:

• Pain that radiates from your neck into your arm or from your lower back into your leg

• Numbness, tingling, or burning in a specific region of your arm, hand, leg, or foot

• Muscle weakness in your arm or leg

• Symptoms that worsen with certain spinal movements

• Local neck or back pain combined with any of the above

Seek emergency care immediately if you experience loss of bladder or bowel control, rapid progression of muscle weakness, or symptoms affecting both legs simultaneously. These may indicate spinal cord compression requiring urgent intervention.

Book a pinched nerve assessment in downtown Toronto

At The Well Adjusted Chiropractic Centre — 69 Yonge Street, Suite 301, steps from Union and King subway stations — we assess spinal nerve compression with a thorough orthopedic examination and structural X-ray analysis where indicated. No referral needed. Same-week appointments typically available.

Call or text: 416-504-8880 Book online: getadjusted.ca/online-booking

Dr. Matthew Hannikainen DC is a chiropractor in downtown Toronto practicing Chiropractic BioPhysics (CBP). He trained at Life West Chiropractic College where CBP was a core technique, and has been in clinical practice for over 19 years. He is a member of the Ontario Chiropractic Association and the Canadian Chiropractic Association.