Can a Herniated Disc Heal Without Surgery? What the Research Shows

Dr. Emily Warren, DPT — a credentialed McKenzie therapist with over 14 years of practice in Salt Lake City — sees this regularly at Mindful Movement PT.

You’ve Already Tried Rest, Ice, and “Core Strengthening” — And You’re Still Limping

I see this pattern three times a week: someone in their late 40s or early 50s, active in the Wasatch, bent over to pick up groceries or sneezed wrong while shoveling snow, and now they’ve got shooting pain down one leg that won’t quit. Their PCP ordered an MRI. The report says “L5-S1 posterolateral disc herniation with nerve root impingement.” The orthopedic surgeon they got referred to said “let’s try six weeks of PT, and if that doesn’t work, we’ll do a microdiscectomy.”

The problem? They went to a high-volume insurance clinic where they got 15 minutes with a PT aide running them through generic “core stability” exercises on a mat, some heat, and maybe some electrical stim. No one assessed which direction their pain moves. No one tested whether their symptoms centralize or peripheralize with specific loading. No one looked at whether they’re an extension responder or a flexion responder — which fundamentally changes everything about treatment.

I had a 52-year-old trail runner from Holladay last year who came in after eight weeks of that exact protocol. She’d been doing planks and bridges religiously. Her pain hadn’t changed. Within two sessions of directional preference testing, we found she was a clear extension responder — her leg pain completely centralized with repeated prone press-ups and went away within three weeks. She’s back on the Bonneville Shoreline Trail now, no surgery.

Here’s what most PTs won’t tell you: the generic “strengthen your core” advice ignores the mechanical behavior of disc herniations. A 2021 study in the Journal of Orthopaedic & Sports Physical Therapy found that patients who received directional preference-matched exercises (McKenzie approach) had significantly better outcomes at 6 months and 1 year compared to generalized exercise — and 83% avoided surgery. But you have to find the right direction first, and that takes time and systematic assessment.

What Actually Happens When a Disc Herniates (And Why It Usually Heals)

Let’s clarify terms first, because imaging reports use them inconsistently and it creates unnecessary panic.

Bulge vs. Protrusion vs. Extrusion

A **bulge** means the outer disc fibers (annulus fibrosus) are intact but the disc has lost height and is bulging symmetrically — like a tire losing air. This is incredibly common and often asymptomatic. A 2015 systematic review in the American Journal of Neuroradiology found disc bulges in 30% of 20-year-olds, 60% of 50-year-olds, and 84% of 80-year-olds with zero back pain.

A **protrusion** means the nucleus (inner gel) has pushed through some layers of the annulus but the base is still wider than the herniated portion. A **herniated disc** or **extrusion** means the nucleus has broken through completely, and the herniated material is now outside the disc space. A **sequestration** means a fragment has broken off entirely. Clinically, I care less about these labels and more about whether the herniation is compressing a nerve root and how your symptoms respond mechanically.

Why Most Herniations Shrink on Their Own

Here’s the part that surprised me early in my career: the bigger the herniation, the faster it often resorbs. Your immune system recognizes extruded nucleus pulposus as foreign material (it normally has no blood supply) and mounts an inflammatory response that breaks it down. A 2020 review in Global Spine Journal tracked herniation size on serial MRIs and found that large extrusions resorbed an average of 70% by volume within 6-12 months, while contained protrusions changed very little.

This is why imaging timing matters. If you get an MRI at 2 weeks post-injury when inflammation is maximal, the herniation looks huge and terrifying. If you get one at 3 months, it’s often meaningfully smaller — but many patients never get that follow-up MRI because they’re already better.

Centralization: The Single Most Important Prognostic Sign

I use the McKenzie Method because it’s the only assessment system that reliably predicts who will respond to conservative care. **Centralization** means your leg or arm pain moves proximally (closer to the spine) or disappears entirely with specific repeated movements. If you have pain radiating to your foot and it moves up to your knee, then your thigh, then just your buttock with repeated extension — that’s centralization, and it’s the best predictor of non-surgical success.

Research published in 2018 in the journal *Spine* followed 312 patients with confirmed disc herniations and found that 89% of those who centralized within the first two weeks avoided surgery and had good-to-excellent outcomes at one year. Only 35% of non-centralizers did well conservatively. This is why my initial eval is 90 minutes — I need time to test every direction methodically and watch how your symptoms behave.

Directional Preference: Why One-Size-Fits-All Exercise Fails

Some people’s herniations respond to extension (lying prone, press-ups, standing backbends). Some respond to flexion (child’s pose, knee-to-chest). Some need lateral shifts. Some need a combination. If you’re an extension responder and someone gives you knee-to-chest stretches, you’ll get worse. If you’re a flexion responder and you do McKenzie press-ups, your leg pain will peripheralize.

I had a 44-year-old software developer from Millcreek last month — L4-5 disc herniation, foot drop starting, neurologist pushing hard for surgery. He was doing yoga (lots of forward folds) because “it felt good in the moment.” Every time he did child’s pose, he got temporary relief, then the leg pain worsened over the next hour. We tested him in extension — pain peripheralized immediately. He was a lateral shift responder with a flexion bias. We corrected his lateral shift first, then loaded him into flexion-based patterns. Foot drop resolved in five weeks, surgery cancelled.

What My Assessment Actually Looks For

When you come in for an initial evaluation, here’s what I’m testing — and why it matters more than what the MRI says.

• Centralization testing with repeated movements: I have you perform 10-15 repetitions of flexion, extension, side-glides, and rotations while I monitor where your pain goes. Does it move toward the spine or away from it? Does it increase or decrease in intensity? This tells me your directional preference and predicts mechanical loading strategy.
• Neurological screening (myotomes, dermatomes, reflexes): I need to know if you have true nerve root compression vs. referred pain. L5 nerve root irritation causes weakness in big toe extension and ankle dorsiflexion. S1 causes weak plantarflexion and an absent Achilles reflex. If these are present, your timeline changes and we watch more carefully for red flags.
• Straight Leg Raise (SLR) and Slump Test: These tension tests tell me how irritable the nerve root is. A positive SLR below 30 degrees with severe pain suggests significant compression. SLR that reproduces pain at 60-70 degrees is less concerning. I also look at whether neck flexion increases leg pain (positive slump) — it confirms neural tension vs. hamstring tightness.
• Lateral shift assessment: Many disc herniations cause a visible trunk shift — you’re leaning away from the painful side to unload the nerve. This has to be corrected before directional loading works. I use specific side-glide techniques to reduce the shift first, then reassess your response to extension or flexion.
• Movement pattern observation: How do you sit down, stand up, bend forward, roll over in bed? Most people with disc herniations have developed compensatory movement strategies that keep loading the disc asymmetrically. I’m watching for hinge patterns, lateral shifts during transitions, and guarding that limits segmental motion.
• Functional loading tolerance: Can you sit for 20 minutes? Walk a mile? Stand from sitting without a pain spike? These baselines tell me how conservative we need to be initially and what your home program can realistically include.

The entire assessment takes 90 minutes because I need to see how your symptoms behave over time with repeated loading. Quick 15-minute evals miss directional preference entirely — you need sustained, repeated movements to see centralization or peripheralization clearly.

What Treatment Actually Involves (Not Just “Stretching and Strengthening”)

If you centralize and we identify your directional preference, treatment follows a specific progression. This isn’t generic “core work.” It’s mechanically matched loading based on how your specific disc herniation responds.

**Phase 1 (Weeks 1-3): Directional Preference Loading and Pain Centralization**

If you’re an extension responder, you’re doing prone lying, prone press-ups (modified cobra poses), and standing extensions every two hours. The goal isn’t strength — it’s mechanical reduction of the herniation and centralization of symptoms. I’m teaching you to load your spine in the direction that moves pain proximally, dozens of times per day. Many patients see significant improvement in leg pain within 5-7 days if we’ve identified the right direction.

If you’re a flexion responder (less common but it happens), we’re doing repeated child’s pose, seated flexion, and posterior pelvic tilts. If you have a lateral shift, we correct that first with side-glides — you’re not ready for flexion or extension loading until the shift is gone.

Research from a 2019 Cochrane review in *Physical Therapy* found that directional preference-matched exercise resulted in faster pain reduction and better function at 3 months compared to non-specific exercise, with a number needed to treat of 4 — meaning for every 4 patients treated this way, one avoided surgery who otherwise would have needed it.

**Phase 2 (Weeks 3-6): Progressive Loading and Functional Reintegration**

Once your leg pain is gone or minimal, we start adding load. This might mean weighted extensions, loaded carries in neutral spine, split-stance loading, or single-leg exercises — depending on what you need to return to. The disc is healing, but it’s still vulnerable. We’re building tolerance progressively so you don’t re-herniate when you go back to real life.

I had a 38-year-old woman from Sandy last spring who herniated L5-S1 lifting her toddler out of the car seat. She centralized beautifully with extension. By week 4, her leg pain was gone. By week 7, she was deadlifting 135 lbs with perfect neutral spine mechanics. She’s back to lifting her (now heavier) toddler without fear.

**Phase 3 (Weeks 6-12): Return to Activity and Movement Education**

This is where most insurance-based PT fails — they discharge you as soon as you’re “functional,” which means you can walk and sit without severe pain. But you still don’t know how to hinge properly, how to load a backpack for a Big Cottonwood Canyon hike, or how to get back into skiing at Alta without herniating again.

I teach you movement patterns that protect the disc long-term: hip hinging instead of lumbar flexion, how to roll out of bed without twisting, how to lift your ski boots into the car, how to set up your workstation so you’re not flexed forward for 8 hours. These aren’t restrictions — they’re movement solutions that let you do what you want without constantly re-irritating the disc.

**When I Use Dry Needling**

If you have severe muscle guarding in the paraspinals, piriformis, or glutes that’s limiting your ability to move into your directional preference, I’ll use trigger point dry needling to release it. This isn’t a primary treatment for disc herniations, but it’s incredibly useful for addressing secondary muscle dysfunction that develops when you’ve been limping and guarding for weeks. I’m certified in dry needling and use it selectively — not on everyone, and not as a standalone treatment.

How Disc Herniations Sabotage an Active Utah Lifestyle

Salt Lake City’s active population makes disc herniation particularly frustrating. You’re not someone who sits on the couch — you’re trying to ski Snowbird on weekends, hike to Lake Blanche, bike up Emigration Canyon, or at minimum take your dog up to Millcreek Canyon without limping.

A disc herniation doesn’t just hurt. It changes your mechanics globally. You start avoiding lumbar flexion, so you bend from your hips awkwardly and strain your hamstrings. You stop rotating through your thoracic spine, so you wrench your neck every time you back the car out. You quit going to yoga because every forward fold peripheralizes your leg pain. You stop running because the ground reaction force spikes your symptoms.

I treat a lot of skiers who herniated discs getting in and out of the car with ski boots on — that forward-flexed, rotated position with load is a perfect storm. They come in terrified they’ll never ski again. Most of them are back on the mountain within 8-12 weeks if we catch it early and load them correctly.

Desk workers in downtown Salt Lake City have their own version: they sit flexed forward for 6-8 hours, then try to mountain bike after work and can’t understand why their back “goes out” constantly. The disc has been loaded in flexion all day, the posterior annulus is maximally stressed, and then they add impact and rotation. I teach them how to break up sitting with standing extensions every 30 minutes, how to set up an external monitor so they’re not flexed forward, and how to unload the disc before athletic activity.

When to Get Imaging (And When It Misleads You)

Here’s my honest take on MRIs for suspected disc herniations: they’re over-ordered, often misinterpreted, and sometimes actively harmful because they create fear that delays recovery.

**When imaging is legitimately useful:**

– You have progressive neurological deficits (foot drop that’s worsening, saddle anesthesia, new bowel/bladder dysfunction) — these are red flags for cauda equina syndrome, and you need emergency imaging and possible surgery
– You’ve done 6-8 weeks of directional preference-matched PT and you’re not improving at all
– Your pain is worst at night, you have unexplained weight loss, or you have a history of cancer (ruling out metastatic disease or infection)
– You had significant trauma (car accident, bad fall) and we’re concerned about fracture

**When imaging misleads you:**

Most people over 40 have disc bulges, protrusions, or even herniations on MRI that cause zero symptoms. A landmark 2014 study in the *American Journal of Neuroradiology* scanned 1,211 people with no back pain and found abnormal discs in the majority: 37% of 20-year-olds, 80% of 50-year-olds, 96% of 80-year-olds. If you get an MRI for acute back pain and it shows a “degenerative disc” or “small herniation,” that might be completely incidental — it might have been there for 10 years and isn’t causing your current pain.

The problem is that once you see the report, it’s hard to un-see it. You start thinking of yourself as someone with a “bad back” or a “damaged disc.” You become afraid to move. You start catastrophizing. Research shows that patients who get early MRIs (before 6 weeks) without red flags have worse outcomes and higher surgery rates than those who don’t — not because the MRI found something worse, but because the psychological impact of seeing “abnormal” on a report changes behavior.

I had a 55-year-old accountant from Cottonwood Heights two years ago who came in with his MRI report clenched in his hand, terrified. It said “large L4-5 disc extrusion with inferior migration and moderate central canal stenosis.” He thought his spine was crumbling. He’d stopped walking his dog. On exam, he centralized completely with extension in 20 minutes. Leg pain gone in 10 days. He never needed surgery. The MRI wasn’t wrong — he did have a large herniation — but it didn’t predict his clinical response to mechanical treatment.

Why Session Length Changes Everything (And Why I Don’t Take Insurance)

I run a cash-based practice, which means you pay per session and I don’t bill insurance. This isn’t about making more money — it’s about providing the type of care that actually works for complex spine cases like disc herniations.

Here’s what happens in an insurance-based clinic: the PT is seeing 3-4 patients per hour. You get 15-20 minutes of face time with the therapist, then you’re handed off to an aide who supervises you doing exercises from a sheet. There’s no time to do a full McKenzie assessment. No time to test every direction and watch for delayed responses. No time to adjust the treatment based on what happens between sessions.

Insurance reimbursements have dropped so low that clinics can’t stay in business seeing one patient per hour — the economics don’t work. So they see more patients simultaneously. The PT becomes a supervisor rather than a clinician. You get generic protocols instead of individualized mechanical assessment.

In my practice, you get 60-75 minutes one-on-one with me, a doctorate-level PT with 13 years of experience and credentialed McKenzie therapist. I’m doing the manual therapy. I’m watching you move. I’m adjusting the plan in real-time based on your response. When you text me between sessions because you’re not sure if a new symptom is normal, I respond — because I have the clinical bandwidth to actually manage your case.

Does it cost more out of pocket? Yes. But clinically, it works better for disc herniations, which require nuanced directional assessment that can’t be done in 15-minute blocks. Most of my disc patients are functionally better in 6-8 sessions over 8-10 weeks. If you go the insurance route and it doesn’t work, you’ve spent 12-16 sessions over 4 months, still hurt, and now you’re looking at surgery. The cost-benefit analysis isn’t as simple as it looks.

I’m not saying insurance-based PT is bad — plenty of conditions do fine with shorter sessions and group-based care. But disc herniations aren’t one of them. You need time, attention, and expertise to identify directional preference and centralization. That’s why I practice the way I do.

The Bottom Line: Most Herniations Heal, But Only If You Load Them Correctly

If you’re reading this because you just got an MRI report that says “herniated disc” and you’re scared, here’s what I want you to know: the imaging report doesn’t determine your outcome. How your symptoms respond to mechanical loading does.

Many herniated disc cases improve without surgery, according to research on conservative care. Improvement is more likely when the clinical exam identifies a directional preference, the plan is progressed consistently, and aggravating loading patterns are modified during recovery. directions that peripheralize symptoms, and progressively rebuild tolerance to functional activities.

Rest doesn’t heal disc herniations — it just delays recovery. Generic core strengthening doesn’t work because it doesn’t account for mechanical behavior. Surgery is sometimes necessary, but it’s vastly over-utilized for cases that would respond to proper conservative care if someone took the time to assess them correctly.

I’ve been treating disc herniations in Salt Lake City since 2012. I have seen patients make meaningful progress with conservative care even after surgery had been discussed. I’ve seen people go from unable to walk a block to hiking Mount Olympus. I’ve also seen people who waited too long, developed permanent nerve damage, and legitimately needed surgical decompression. The key is early, skilled assessment and directional preference-matched treatment — not waiting around hoping it gets better on its own.

If you’re in that window where you’re trying to decide whether to schedule surgery or try PT, get a proper McKenzie assessment first. Ninety minutes of systematic mechanical testing will tell you more about your prognosis than the MRI report does.

Related Resources

• McKenzie Method Physical Therapy in Utah
• Sciatica Treatment in Salt Lake City
• Back Pain Treatment in Salt Lake City
• Bulging Disc Treatment in Salt Lake City
• Spinal Stenosis Treatment in Salt Lake City
• Cash-Based Physical Therapy in Utah
• Direct Access Physical Therapy in Utah

Related Reading

• Why Challenging Back & Neck Pain Responds to Advanced PT
• Can Physical Therapy Prevent Back Surgery?
• McKenzie Method FAQ — Your Complete Guide