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Conditions 8 min read February 18, 2026 Written by: Dr. Erik Anderson DC*

Sciatica and Disc Problems: What You Need to Know

When back pain shoots down your leg, here's what's actually happening and what to do about it

The pain woke you up at 3 AM. Not just back pain, but a searing electrical sensation running down the back of your leg, all the way to your foot. You can barely stand straight. Getting out of bed feels impossible. Your colleague mentioned sciatica once, and you Googled it at 4 AM while lying on the floor. Now you're worried about your disc, wondering if you need surgery, and trying to figure out if you should book an MRI tomorrow.

Let me give you the information that might help you sleep better tonight.

What Actually Is Sciatica?

The word "sciatica" gets thrown around for any leg pain, but true sciatica refers specifically to nerve root compression. Your sciatic nerve forms from several nerve roots that exit the lower spine, runs through your pelvis, and travels down your leg. When something presses on those nerve roots (usually at the L4, L5, or S1 levels), you get sciatica.

This is different from referred pain, where your back muscles or joints create pain that spreads into your leg but doesn't follow a nerve pathway. True sciatica follows a specific dermatomal pattern. It's usually one-sided, follows the back, side, or front of your leg, depending on which nerve root is involved, and may include numbness, tingling, or weakness.

The Disc Connection

Most cases of sciatica in people under 50 come from disc herniations. Your discs sit between your vertebrae and act as shock absorbers. They have a tough outer layer and a gel-like center. When the outer layer weakens or tears, some of that center can push out and press on a nerve root.

Here's the first piece of good news: having a disc herniation doesn't mean your spine is broken or that you'll need surgery. Research shows that most disc herniations actually shrink over time. A systematic review of studies following people with confirmed disc herniations on MRI found that herniation size frequently reduces over time, with sequestrated fragments (where disc material has fully separated from the disc) showing the highest rates of spontaneous resorption and smaller contained herniations being less predictable.

What the Research Tells Us

The SPORT trial (Spine Patient Outcomes Research Trial) is one of the largest and most detailed studies comparing surgery to conservative care for disc herniations with sciatica. The findings are nuanced but reassuring.

In the short term (three months), people who had surgery reported faster improvement in pain and function. The picture at two and four years is more nuanced. In the intention-to-treat analysis, differences between groups were small and largely converged, but roughly half of the people assigned to conservative care had eventually crossed over to surgery over the full study period, which limits what that analysis can tell us. When researchers looked at outcomes based on treatment actually received, surgery showed statistically significant advantages in pain and function at two, four, and eight years. Both analyses are valid. What the trial shows is that most people do get better with conservative care, and that for people who need faster or more complete relief, surgery has a meaningful role.

This doesn't mean surgery is never right. If you have progressive weakness (like foot drop), severe unrelenting pain despite appropriate conservative care, or cauda equina syndrome (a rare emergency involving bowel/bladder dysfunction), surgery may be necessary. But for most people with sciatica from a disc herniation, conservative care gives you time for your body's natural healing process to work.

What Does Conservative Care Actually Look Like?

Conservative care isn't just "wait and see." It's an active process that might include:

• Manual therapy (like chiropractic adjustments or mobilization) to improve segmental mobility and reduce pain sensitization
• Specific exercises and movements that, for people who respond to directional loading, help centralize pain (bring it back toward your spine and away from your leg)
• Education about positions and movements that provoke or ease symptoms
• Sometimes medication for pain management during the acute phase
• Gradual return to normal activities as symptoms allow

The goal isn't to "put the disc back in." Despite what you might hear, that's not how this works. The goal is to create an environment where inflammation settles, nerve irritation decreases, and your body can reabsorb the herniated material.

Movement and Recovery

In the acute phase, some protective behaviour is completely appropriate. If certain positions or movements provoke your symptoms, avoiding them while things settle makes sense. The research concern is different: it's about what happens over weeks and months if rest and avoidance become the default response rather than a short-term strategy.

Studies on fear-avoidance in back pain consistently show that people who get an MRI report, read "disc herniation," and become convinced they're fragile tend to have slower recoveries. They stop moving, they avoid activities they love, and they stay hyperaware of every sensation. This isn't a character flaw; it's a predictable response to a frightening diagnosis. But understanding that the label on your MRI doesn't define your trajectory can genuinely change outcomes.

Your disc herniation is a snapshot of one moment. Your body is constantly changing and healing.

When to Be Concerned

Most sciatica improves with conservative care, but there are situations where you need immediate medical attention or surgical consultation:

• Cauda equina syndrome: Difficulty initiating urination, urinary retention, or loss of bowel or bladder control; numbness in the groin/inner thighs ("saddle anesthesia"); lower limb weakness (which may affect one or both legs). This is a surgical emergency.
• Progressive weakness: If your foot drop or leg weakness is getting worse over days or weeks despite treatment, you need reassessment.
• Severe, unrelenting pain: Pain that doesn't respond to position changes, medication, or any conservative measures may need more aggressive intervention.
• Trauma or systemic symptoms: Back or leg pain following a significant fall, accident, or impact, or accompanied by fever, unexplained weight loss, or a history of cancer, warrants prompt medical evaluation rather than conservative care alone.
• Inadequate improvement with conservative care: If you've completed a genuine trial of structured conservative care, typically six weeks or more, without meaningful improvement, surgical consultation is a reasonable next step in discussion with your treating practitioners, even without emergency symptoms.

These situations are uncommon. The vast majority of people with sciatica get better without surgery.

What This Means for You

If you're dealing with sciatica right now, I know it's miserable. The pain is real, the fear is real, and the disruption to your life is real. But there's also real reason for optimism.

Most people get better. Your body has powerful healing mechanisms. You don't need to rush into surgery unless there's a genuine medical emergency or your symptoms aren't improving with appropriate conservative care.

Find a provider who understands sciatica, who can guide you through evidence-based conservative care, and who knows when to refer you for surgical consultation if needed. Give your body time to heal. Stay engaged with your care. And remember that a disc herniation on an MRI doesn't define your future.

If you're dealing with back pain or sciatica and want to understand your options, see the sciatica overview or explore the research in more depth: what happens to disc herniations over time and a detailed look at the surgery vs. conservative care evidence.

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