Medically reviewed by Izza Tahir, MBBS · Last updated: August 23, 2026
Our Specialists for Lumbar Disc Herniation
Most lumbar disc herniations don't need an operation — but when they do, the surgeon matters. These are the UChicago spine surgeons who see this problem every week and decide, with you, whether surgery will help.
Dr. Bydon is the Chair of Neurological Surgery at UChicago and has built his career around minimally invasive and robotic-assisted lumbar surgery — including microdiscectomy for herniated discs. He has published extensively on outcomes and recurrence patterns after lumbar disc surgery, drawing on experience with thousands of spine operations performed at Mayo Clinic before he was recruited to UChicago.
Dr. Herman, a UChicago spine surgeon, regularly treats patients with sciatica caused by lumbar disc herniations. He performs a range of lumbar decompression procedures, from basic microdiscectomy to intricate revisions for recurring herniations. Additionally, as Program Director of the Neurosurgery Residency, he mentors future spine surgeons in these methods.
Dr. Witham is Section Chief of Spine Surgery at UChicago and a pioneer in augmented reality-guided spine surgery, including the first FDA-cleared AR-guided spine procedure on a living patient. For lumbar disc herniation, he applies the same image-guided, minimally invasive philosophy he has published on in high-impact peer-reviewed work (J Neurosurg Spine, 2021).
What Is a Lumbar Disc Herniation?
In your lower spine, a rubbery cushion known as an intervertebral disc lies between each bone. Each disc features a sturdy outer layer (the annulus) and a softer, jelly-like core (the nucleus pulposus). A herniation occurs when the soft center pushes through a weakened area of the outer ring and compresses a nearby nerve root.
The disc itself typically isn't the issue; instead, the problem arises when displaced material presses on one of the nerves that runs from your lower back into your leg. This is why the typical symptom isn't just back pain; it's pain, tingling, or weakness that radiates down the leg — commonly known as sciatica.
Herniations are common. They peak in people aged 30-50, affect men slightly more than women, and most often occur at the bottom two levels of the lumbar spine (L4-L5 and L5-S1). The good news: the vast majority of herniations get better without surgery. Studies using repeat MRI scans show that the body actually reabsorbs disc material over time — roughly 70% of extruded herniations and more than 90% of sequestered fragments shrink on their own within a year.
At a Glance
- A lumbar disc herniation is a soft spinal disc that has bulged or ruptured into the space where nerve roots travel — often causing the leg pain people call sciatica.
- Most herniations get better on their own: about two-thirds shrink or resorb over time, and most patients improve without surgery.
- First-line treatment is non-operative — activity modification, physical therapy, anti-inflammatories, and sometimes an epidural steroid injection.
- Microdiscectomy is a small, targeted operation that reliably relieves sciatica in properly selected patients, usually as a same-day procedure.
- Urgent surgery is needed only for cauda equina syndrome or a progressive neurologic deficit — these are emergencies.
Do you have imaging related to Lumbar Disc Herniation?
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What Does It Feel Like?
The symptoms come from the nerve that's being pinched — not the disc itself. Where you feel it depends on which nerve root is involved.
Classic symptoms
- Leg pain that's worse than the back pain — often sharp, electric, or burning, running from the buttock down the thigh or calf and sometimes into the foot
- Pain that gets worse with sitting, bending, coughing, or sneezing
- Numbness or tingling along a specific strip of skin in the leg or foot
- Weakness in specific muscles — for example, difficulty lifting the foot (foot drop), trouble rising on your toes, or a buckling knee
- Pain relief when lying down flat
Red flags — call us right away
A small number of herniations press on multiple nerves at once and become a true emergency called cauda equina syndrome. Get immediate medical attention if you have any of the following:
- New difficulty controlling your bladder or bowels, or numbness in the groin/inner thighs ("saddle anesthesia")
- Rapidly worsening weakness in one or both legs
- Severe, progressive numbness
These findings can mean that nerves are being crushed, and timely surgery — ideally within 24-48 hours — gives the best chance of recovery.
How Is It Diagnosed?
Most of the diagnosis happens in the exam room, not the scanner. A careful history and neurologic exam — testing strength, sensation, reflexes, and maneuvers like the straight leg raise — can usually pinpoint which nerve root is irritated before any imaging is ordered.
MRI is the most useful imaging test. It shows the disc, the nerve roots, and how they interact in exquisite detail. We typically order an MRI if symptoms aren't improving after 4-6 weeks of conservative care, if there are progressive neurologic findings, or any time there are red flags.
One important caveat: MRI findings alone don't decide treatment. A large number of people without any leg pain have disc bulges or herniations on imaging. Your MRI needs to match your symptoms and your exam. If it doesn't, operating on the disc is unlikely to make you feel better.
X-rays, CT scans, and electrodiagnostic studies (EMG/nerve conduction) can occasionally add information, but MRI remains the gold standard for surgical planning.
How Is It Treated?
Start with non-operative care — it works for most people
Because most herniations improve on their own, the first line of treatment is almost always non-surgical. A typical plan includes:
- Activity modification — stay active within your limits, but avoid the movements that clearly provoke symptoms
- NSAIDs and short courses of oral steroids to calm the inflammation around the nerve root
- Physical therapy focused on core stabilization, nerve glides, and gradual reconditioning
- Epidural steroid injections for patients whose leg pain is severe or not responding — these offer moderate short-term relief and can help patients get through physical therapy without surgery
Most patients who follow this plan improve substantially within 6-12 weeks. The goal isn't to avoid surgery at all costs — it's to give your body a real chance to heal itself before taking on the risks of an operation.
When surgery is the right answer
Surgery is considered when leg pain is severe and persistent despite 6-12 weeks of conservative care, when there's a meaningful neurologic deficit, or urgently when there's cauda equina syndrome or rapidly progressing weakness. The procedure of choice for a typical single-level herniation is a microdiscectomy.
Microdiscectomy
A microdiscectomy is a minor, focused surgery performed through a roughly one-inch incision. With the aid of an operating microscope, the surgeon extracts only the disc fragment pressing on the nerve root, leaving the rest of the disc intact. This is usually a same-day procedure; most patients walk the same day and can go home within a few hours.
Results are consistent and predictable. The SPORT trial, the largest randomized study ever done on this question, showed that patients who chose surgery had faster and larger improvements in leg pain, function, and disability than patients who stuck with non-operative care — and those benefits held up at 4 and 8 years of follow-up.
Tubular and endoscopic discectomy
Smaller, more minimally invasive approaches use a tubular retractor or an endoscope to reach the disc through an even smaller corridor. Randomized trials comparing tubular discectomy to standard microdiscectomy show essentially equivalent long-term clinical outcomes at 5 years — patients get the same relief with a slightly different corridor. Endoscopic discectomy is a similar story: excellent results in the right hands, with a slightly steeper learning curve. The best approach for you depends on the anatomy of your herniation and your surgeon's experience.
Urgent surgery for cauda equina syndrome
Cauda equina syndrome is a surgical emergency. The standard of care is decompression as soon as safely possible — ideally within 24-48 hours of symptom onset — to maximize the chance of recovering bladder, bowel, and motor function. This is one of the few situations in spine surgery where time genuinely matters.
Planning treatment for Lumbar Disc Herniation?
Your Lumbar Disc Herniation records can be discussed by the appropriate specialists so the recommendation reflects the full case.
What Are the Outcomes?
Lumbar disc herniation has some of the best outcomes in spine surgery. In the right patient, microdiscectomy produces durable leg pain relief, strong functional recovery, and a reliable return to work. Here is what the best evidence shows:
| Outcome | What to expect | Source |
|---|---|---|
| Leg pain relief at 1 year | Large, sustained improvement; surgery outperforms non-operative care | SPORT trial |
| Function at 5 years | Improvements largely maintained; minimal drop-off from year 1 | SPORT 4- and 8-year results |
| Same-level recurrence | Approximately 5-15% over long-term follow-up | Multiple cohort studies |
| Return to work | Median around 3-4 weeks for sedentary jobs; longer for heavy labor; roughly 75-85% returning overall | Systematic review, Spine 2025 |
| Spontaneous regression (no surgery) | ~70% of extruded and ~90%+ of sequestered fragments shrink on MRI | Chiu et al. meta-analysis |
A few things are worth emphasizing. First, choosing surgery isn't a failure — for properly selected patients with severe leg pain, the evidence is clear that surgery gets you better, faster. Second, non-operative care is also highly effective — at long-term follow-up, most patients who started conservatively end up doing well. Third, the small but real recurrence rate is why we counsel patients carefully about body mechanics, weight management, and smoking cessation after surgery.
Where surgical experience matters most is in deciding when not to operate, in matching the right technique to the right anatomy, and in handling the unusual cases — large far-lateral herniations, upward-migrated fragments, cauda equina, or patients with multiple prior surgeries. That's the day-to-day work of an experienced spine team.
References
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