A herniated disc is the most common structural cause of both sciatica and neck-to-arm pain. The good news — something many patients are surprised to hear — is that 80 to 90 percent of people with a herniated disc recover without surgery. The body has a remarkable ability to resorb extruded disc material over time, and for most people, the right non-surgical treatment is all that’s needed.
What Exactly Is a Herniated Disc?
Each intervertebral disc has two components: a tough outer ring (the annulus fibrosus) and a soft gel-like center (the nucleus pulposus). A herniated disc occurs when the nucleus pushes through a tear in the annulus — like jam squeezing out of a doughnut — and contacts a nearby nerve root. Per the AANS, disc herniation is the leading cause of true sciatica.
In the lumbar spine, L4–L5 and L5–S1 account for the vast majority of herniations. In the cervical spine, C5–C6 and C6–C7 are most commonly affected. An important distinction: a bulging disc (symmetric expansion without rupture) and a herniated disc (focal, asymmetric protrusion through an actual tear) are different. Herniations are more likely to produce specific nerve pain.
Lumbar Herniated Disc Symptoms
- Low back pain — often a deep ache with sharp flares during certain movements
- Sciatica — shooting, electric pain from the buttock down the leg to the calf or foot
- Numbness or tingling in a specific part of the leg or foot — the exact location identifies which nerve root is affected
- Leg weakness — difficulty climbing stairs, rising from a chair, or lifting the front of the foot (foot drop)
- Pain sharply worsens with coughing, sneezing, or bearing down
⚠ Important
Loss of bladder or bowel control — or sudden saddle area (groin/inner thigh) numbness — is a potential cauda equina syndrome emergency. Go to an emergency room immediately.
Cervical Herniated Disc Symptoms
- Neck pain, typically worse with movement or sustained positions
- Arm pain, burning, or aching radiating from the neck to the shoulder and down into the hand
- Numbness or tingling in specific fingers — the pattern identifies the disc level involved
- Grip weakness or dropping objects
- In severe cases: gait difficulty, imbalance, or fine motor problems (cervical myelopathy — cord compression)
How We Diagnose a Herniated Disc
Diagnosis begins with a thorough neurological examination. Dr. Grewal tests reflexes, strength, and sensation in a systematic way that identifies which nerve is compressed and how severely. An important caveat: many people over 40 have disc bulges or mild herniations on MRI without any symptoms. Dr. Grewal correlates imaging findings with your actual symptom pattern before drawing conclusions.
MRI — The Gold Standard
MRI shows the disc, nerve roots, and spinal cord in detail without radiation. It identifies the level of herniation, the direction it’s pressing on the nerve, and whether any cord signal change (myelopathy) is present.
EMG and Nerve Conduction Studies
Performed by Dr. Patwary, these tests measure the electrical activity of nerves and muscles — identifying which nerve root is affected and assessing the severity of any damage. Particularly useful when imaging and symptoms don’t clearly correlate.
Treatment — Starting Without Surgery
Physical Therapy
For most lumbar disc herniations, extension-biased exercises (McKenzie method) reduce pressure on the affected nerve root by moving disc material away from it. Go Rehab Physical Therapy provides this specialized spine rehabilitation at all Grewal Spine locations.
Epidural Steroid Injections
When inflammation around the compressed nerve root is driving severe pain, a fluoroscopically-guided transforaminal injection places corticosteroid precisely at the affected nerve root. Fifty to seventy percent of appropriately selected patients experience significant short-term improvement.
When Surgery Makes Sense
Lumbar microdiscectomy is the most common minimally invasive spine procedure performed when conservative care has failed after 6–12 weeks, or when neurological deficits are significant or worsening. The evidence base is extensive: a systematic review in BMC Musculoskeletal Disorders reports success rates of 78–95% of patients at 1–2 years post-surgery. A direct comparison study (2020–2023, n=396) found microdiscectomy achieved an 86.8% success rate versus 77.8% for traditional open discectomy (p=0.050). Through a small 1–2 cm incision with a surgical microscope, the herniated fragment is removed — typically an outpatient procedure, with the majority of patients experiencing significant improvement in leg pain within days to weeks of surgery.
The SPORT trial (JAMA 2006, n=501, 13 spine clinics across 11 US states) demonstrated that surgically treated disc herniation patients achieved 40.9-point improvement in bodily pain at 3 months versus 26.0 for non-operative treatment — with benefits durable through 8-year follow-up. Reherniation occurs in 5–21% of patients following primary discectomy and is the leading cause of reoperation, which is why post-operative physical therapy and core strengthening through Go Rehab are integral parts of the treatment plan.
★★★★★ Sybille Nagorski-Drew
“Dr Grewal changed my life. I went from a 37-year-old living in daily pain to feeling like I have my life back. I am so grateful for the procedure he did on my neck.”
Sources & Clinical References
- Weinstein JN, et al. ‘Surgical vs nonoperative treatment for lumbar disk herniation: the SPORT observational cohort.’ JAMA. 2006;296:2451–2459. [Pain 40.9 surgery vs 26.0 non-op at 3 months]
- Weinstein JN, et al. ‘Surgical vs nonoperative treatment for lumbar disc herniation: 4-year SPORT results.’ Spine. 2008;33(25):2789–2800. [Durable surgical advantage through 4 years]
- Physical prognostic factors predicting outcome following lumbar discectomy surgery: systematic review. BMC Musculoskeletal Disorders. 2018. [Success rates 78–95% at 1–2 years]
- Comparative analysis of microdiscectomy vs open discectomy (n=396, 2020–2023). PJMS. 2024. [86.8% vs 77.8% success]
- AAOS OrthoInfo. ‘Herniated Disk in the Lower Back.’ orthoinfo.aaos.org. 2025.
- AANS. ‘Herniated Disc.’ aans.org. 2025.
- AAPMR KnowledgeNow. ‘Lumbar Radiculopathy.’ now.aapmr.org.
- NASS. Clinical guidelines — ESI evidence for disc herniation. spine.org.
