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The Most Common Causes of Lower Back Pain Revealed

Published: February 26, 2026

Lower back pain isn't just one thing; it's a symptom that can point to a wide range of underlying issues. Most often, the problem falls into one of two camps: mechanical issues (the way your back moves) or structural problems (changes to the spine itself). Pinpointing which category your pain fits into is the first, most crucial step toward finding real, lasting relief.

Your Guide to Understanding Lower Back Pain

Lower back pain can feel like an unwelcome intruder, disrupting everything from your workday to your weekend plans. If you're tired of guessing what’s causing that ache, you've come to the right place. This guide is designed to move beyond generic advice and give you a clear roadmap to understanding what's really going on in your back.

Think of your spine as a complex, high-performance machine. To fix it when something goes wrong, you need to understand how all its parts are supposed to work together. We’ll walk you through the most common culprits behind back pain, helping you connect the dots and introduce you to modern, non-surgical ways to get back to feeling like yourself.

Mechanical vs. Structural Causes

To make sense of back pain, it helps to start with these two distinct groups. They give us a framework for figuring out the source of the problem.

  • Mechanical Issues: These are by far the most frequent culprits. They’re all about how your spine moves and functions. This includes the classic muscle strain from lifting something too heavy, a ligament sprain from a sudden, awkward twist, or the slow, creeping pain that comes from hours of poor posture.
  • Structural Problems: This category deals with changes to the actual physical components of your spine. We're talking about things like a herniated disc that bulges out and presses on a nerve, spinal stenosis where the spinal canal narrows, or degenerative disc disease where the spine's natural cushions wear down over time.

This chart helps visualize how these different factors contribute to back pain.

A concept map illustrating causes of back pain, divided into mechanical and structural factors.

As you can see, pain can come from the daily stress we put on our backs (mechanical) just as easily as it can from underlying changes to the spine’s architecture (structural).

To help you quickly identify potential sources, here’s a simplified breakdown of the most common issues we see.

Quick Guide to Common Lower Back Pain Sources

Pain Source Primary Cause What It Feels Like
Muscle or Ligament Strain Overstretching or tearing of soft tissues from lifting, twisting, or trauma. A localized, dull ache or sharp pain that often worsens with movement.
Bulging or Herniated Disc The inner gel of a spinal disc pushes out, potentially pressing on a nerve. Sharp, shooting pain that may travel down the leg (sciatica); numbness or weakness.
Degenerative Disc Disease The gradual wear-and-tear and thinning of spinal discs due to aging. A chronic, low-level ache that can flare up into more severe pain, often worse when sitting.
Facet Joint Dysfunction Inflammation or irritation of the small joints that connect your vertebrae. A sharp, localized pain that can feel worse when bending backward or twisting.
Spinal Stenosis Narrowing of the spinal canal, which puts pressure on the spinal cord and nerves. Aching, cramping, or numbness in the legs, often relieved by leaning forward or sitting.
Sacroiliac (SI) Joint Pain Irritation in the joint connecting the spine to the pelvis. Dull ache felt on one side of the low back or in the buttock, can radiate down the leg.

This table is a starting point, but a proper diagnosis is key. Understanding these differences helps you have a more informed conversation with your healthcare provider.

A proactive approach is always the best defense. Building a more resilient spine starts with understanding what makes it vulnerable in the first place. For a deeper look into preventative strategies, this guide on How to Prevent Lower Back Pain is an excellent resource.

Our goal here is to help you connect these concepts to what you're actually feeling. By exploring the most common causes in more detail, you'll be much better prepared to find a solution that works for you, guided by the expertise of Dr. Leonard Hayes and the team here at Bonesetters Chiropractic.

Mechanical Issues and Lifestyle Triggers

Most stories of lower back pain start right here, with the everyday wear and tear we put on our spines. Think of your spine as the central support beam of your house. If you consistently load it unevenly or hit it with sudden, jarring forces, cracks are going to start showing up. That’s really all mechanical back pain is—it’s not a disease, but a direct result of how we use, and often misuse, our bodies.

These mechanical problems are, by far, the most common reason for that familiar ache in the lower back. They account for the vast majority of cases I see. Sometimes it's a single, memorable event, like lifting a heavy box with a twist. Other times, it's the slow, quiet damage from years of seemingly harmless habits. Figuring out these triggers is the first step toward building a stronger, more resilient back.

The Anatomy of a Strain or Sprain

At the heart of most mechanical pain are two very common injuries: muscle strains and ligament sprains. People often use these terms interchangeably, but they affect different parts of your back.

  • Muscle Strains: This is when you overstretch or tear the actual muscle fibers in your lower back. It can happen all at once or from chronic overuse, leading to inflammation and pain.
  • Ligament Sprains: Ligaments are the tough, fibrous bands that connect your vertebrae and stabilize your spine. A sprain happens when these get stretched beyond their limits, usually during a sudden, awkward movement.

Both injuries set off an inflammatory alarm in your body, causing pain, stiffness, and muscle spasms as your body scrambles to protect the injured area. The pain is usually right on the spot, gets worse when you move, and feels better with a bit of rest. It’s your body's way of sending a clear signal that you’ve pushed past a mechanical limit.

How Modern Life Sets the Stage for Back Pain

More often than not, our daily routines are the real culprits. Our modern lifestyle, for all its convenience, has practically engineered movement out of our day, forcing our spines into positions they were never designed to hold for hours on end.

The "office slump" is a perfect example. Spending eight hours a day hunched over a keyboard puts constant, grinding pressure on your lumbar discs. At the same time, it weakens the very core muscles that are supposed to be supporting your spine. Your head, which weighs about 10-12 pounds, creeps forward, forcing the muscles in your lower back to work overtime just to hold you up. Over months and years, this postural strain becomes a primary cause of chronic pain.

Key Insight: Think of chronic poor posture as a slow-motion injury. It doesn't cause that immediate, sharp "ouch," but it gradually weakens your spinal structures, making you far more likely to suffer an acute injury from a seemingly minor movement.

And this constant stress isn't just for desk jockeys. Repetitive motions in manual labor, long-haul driving, or even just looking down at your phone for hours on end can create the exact same patterns of muscle fatigue and ligament strain.

The Impact of How You Move

Beyond just sitting still, the way you move—or don't move—has a massive impact. Improper lifting is one of the quickest ways to cause an acute back injury. When you bend at the waist to lift something heavy, you essentially turn your spine into a crane, putting enormous pressure on the small muscles and discs in your lower back.

Lifting correctly—by bending at the knees and using your powerful leg muscles—spreads the load safely. The difference is staggering. A simple 50-pound object can put more than 500 pounds of force on your lower back when you lift it the wrong way. It’s no surprise that so many back injuries happen during simple tasks like moving furniture or carrying in the groceries.

This isn’t just a local problem; it's a global one. Low back pain among working-age adults has skyrocketed worldwide. Globally, there were an incredible 452.8 million cases in 2021, which is a 52.66% jump since 1990. This trend is directly tied to mechanical strains from poor ergonomics and overexertion. These aren't just numbers; they represent millions of people whose lives are being disrupted by what are often preventable mechanical issues.

Finally, weakness in your core muscles—the deep abdominal and back muscles that act like a natural corset for your spine—leaves your back unsupported and vulnerable. When these muscles are weak, smaller muscles that aren't designed for the job are forced to take over, leading to fatigue and strain. This often creates a vicious cycle: pain leads to inactivity, which causes more muscle weakness, which in turn leads to more pain. It can also contribute to related issues like sacroiliac joint dysfunction. If you're experiencing pain on one side of your low back or buttocks, you might be interested in our guide on sacroiliac joint adjustment.

When Spinal Structures Start to Change

Moving beyond simple muscle aches, some of the most persistent lower back pain comes from gradual changes to the very architecture of your spine. Over time, the parts designed to support and flex can wear down or shift out of place, leading to chronic, nagging discomfort. These conditions often have intimidating names, but the mechanics behind them are actually quite straightforward.

Think of a healthy spinal disc as a tiny, perfectly formed jelly donut sitting between two of your vertebrae. It’s got a tough, fibrous outer layer (the annulus fibrosus) and a soft, gel-like center (the nucleus pulposus). This brilliant design acts as a cushion, absorbing shock and giving your spine its incredible flexibility. When that little donut gets damaged, pain is almost always the result.

Man with poor posture working on a laptop at a desk, illustrating potential strain.

Disc Problems: Herniation and Bulges

One of the most notorious structural issues is a herniated disc. Let's go back to our donut analogy. If you squeeze one side of it too hard, what happens? The jelly starts pushing its way out. In your spine, when a disc bulges or completely ruptures (herniates), that gel-like center can press directly on the super-sensitive spinal nerves that run alongside it.

This nerve pressure is the classic culprit behind sciatica. It’s not just an ache in your back; it’s that sharp, zinging, sometimes electric pain that shoots from your buttock down your leg, occasionally reaching all the way to your foot. You might also feel numbness, tingling, or even weakness in that leg because the nerve's signal is being physically interrupted.

A bulging disc is essentially a less dramatic version of this. The disc pushes outward but hasn't fully ruptured. While it might not cause any symptoms at first, it's a clear signal that the disc is under significant stress and could be a precursor to a full-blown herniation.

The Slow Fade of Degenerative Disc Disease

Another incredibly common diagnosis is degenerative disc disease (DDD). Now, this isn't really a "disease" in the way we typically think of one. It’s more of a descriptive term for the natural, age-related wear and tear our spinal discs go through. Over many years, the discs slowly lose water content, kind of like a plump grape shriveling into a raisin.

As they dehydrate, these discs shrink and become less effective at absorbing shock. This loss of height closes down the space between your vertebrae, which can kickstart a whole new set of problems. The pain from DDD is often a chronic, low-level ache that flares up into more intense episodes, and it frequently feels worst after sitting for a while or first thing in the morning.

Lower back pain doesn't discriminate by age, but its peak assault often happens around 50-55 years old, when lumbar degeneration from wear-and-tear becomes a silent saboteur. In 2020, LBP struck 619 million people worldwide—that's about 1 in 13 globally—a 60% jump from 1990 levels, cementing it as the number one cause of years lived with disability. By 2050, 843 million cases are projected, a 36.4% rise. You can read the full research about these global back pain trends to understand its widespread impact.

Getting a handle on this process is key to your long-term spinal health. If this sounds familiar, you might find our guide covering treatment options for degenerative disc disease helpful for exploring non-surgical solutions.

Spinal Stenosis: When Space Runs Out

The gradual changes from conditions like degenerative disc disease or the formation of bone spurs from arthritis can create another issue: spinal stenosis. The word "stenosis" just means narrowing. In this context, it’s the spinal canal—the hollow channel protecting your spinal cord and nerves—that’s becoming smaller.

Imagine a busy highway where a lane is suddenly closed for construction. Traffic immediately backs up, and chaos follows. Spinal stenosis does something similar to your nerves. This narrowing effectively creates a traffic jam, putting the squeeze on the spinal cord and the nerves that branch out to your legs.

The symptoms of lumbar spinal stenosis are quite unique:

  • Pain with activity: Walking or even just standing for a period can bring on pain, cramping, or numbness in the legs.
  • Relief from leaning forward: People with stenosis often discover that leaning on a shopping cart or sitting down brings almost instant relief. This posture, nicknamed the "shopping cart sign," actually flexes the spine just enough to open up the canal and take pressure off the nerves.

This condition is most common in adults over 60 and is a direct result of the cumulative wear and tear our spines endure over a lifetime. Understanding these fundamental structural changes is the first step toward a proper diagnosis that gets to the root cause of your pain.

Less Common Causes and Red Flag Symptoms

Doctor examining a human spine model, highlighting a herniated disc condition.

While most lower back pain comes from the familiar mechanical issues we've already covered, a small percentage of cases have different roots. It's important to know about these less common causes—not to cause alarm, but to give you a complete picture of your spinal health.

Knowing about these conditions, and more importantly, the "red flag" symptoms associated with them, empowers you to understand when you need to seek immediate medical help.

Understanding Sacroiliac Joint Dysfunction

One of these less common culprits is sacroiliac (SI) joint dysfunction. Your two SI joints are incredibly tough, acting as shock absorbers where your pelvis connects to the base of your spine. When these joints get inflamed or stop moving correctly (either too much or too little), they can cause a deep, dull ache in the lower back or buttock, usually on one side.

The tricky part about SI joint pain is that it's a great imitator. It can feel a lot like sciatica or a disc problem, often getting worse when you climb stairs, run, or even just stand up from a chair. It takes a careful physical exam to pinpoint the SI joints as the real source of the trouble.

When a Vertebra Slips Forward

Another structural problem we see is spondylolisthesis. This happens when one of your lower back vertebrae slips forward over the one below it. Think of a stack of building blocks—if one slides out of line, the whole stack becomes unstable. That's essentially what happens in your spine.

This slippage can happen because of a small fracture in the bone, often from overuse in sports, or it can develop slowly as part of the aging process. The out-of-place vertebra can pinch spinal nerves, causing not just back pain but also tight hamstrings and pain that travels down the legs.

Red Flags You Must Not Ignore

The good news is that the vast majority of back pain is not a medical emergency. However, some symptoms are your body's way of screaming for help, signaling a much more serious problem that needs immediate attention.

It is absolutely critical to seek medical care immediately if your back pain is accompanied by any of these red flag symptoms. They can indicate serious conditions like an infection, a tumor, or severe nerve compression that could lead to permanent damage if left untreated.

Pay very close attention if your back pain comes with any of the following:

  • Loss of Bowel or Bladder Control: This is the most urgent red flag and can signal a serious condition called cauda equina syndrome, which requires emergency surgery.
  • Progressive Weakness in the Legs: If you find yourself stumbling or your legs feel like they're giving out, this points to significant nerve compression.
  • Numbness in the Groin or "Saddle" Area: Losing sensation in the areas that would touch a saddle is another classic sign of severe nerve involvement.
  • Unexplained Weight Loss: When combined with persistent back pain, this can sometimes point to a systemic issue like an infection or, rarely, a tumor.
  • Fever or Chills: Back pain plus a fever isn't normal; it could mean you have a spinal infection.
  • Pain Following a Major Trauma: If your back pain started right after a serious fall or car accident, you need to be checked for a fracture.

Knowing these signs isn't about creating fear—it's about making sure you act quickly and decisively to protect your long-term health.

Finding the Root Cause with Modern Diagnostics

Knowing the potential sources of your lower back pain is half the battle. The other, more critical half, is getting an accurate diagnosis. This is the bridge between knowing something is wrong and knowing exactly what to do about it. A precise diagnosis saves you from the frustration of trying treatments that simply aren't right for your specific condition.

Think of the diagnostic process like a skilled detective gathering clues to solve a case. The goal isn’t just to put a name to the condition, but to truly understand its unique impact on your body. This allows us to build a care plan that’s actually personalized to you, ensuring we’re not just chasing symptoms but fixing the root mechanical or structural issue.

The Foundation of Diagnosis: Your Physical Exam

The first and most important step is always a thorough physical examination. This is so much more than a simple conversation; it's a hands-on assessment where a practitioner observes how your body moves, where you feel pain, and how your nervous system is responding to different tests.

During this exam, we’ll look at several key things:

  • Range of Motion: How far can you bend forward, backward, and to the side? Limited or painful movement gives us vital clues about which joints and muscles are involved.
  • Reflexes and Strength: We’ll test reflexes in your knees and ankles and check the muscle strength in your legs. This helps us see if a spinal nerve is being compressed or irritated.
  • Palpation: By carefully feeling along your spine, we can identify specific areas of tenderness, muscle spasms, or subtle misalignments in the vertebrae and sacroiliac joints.
  • Nerve Tension Tests: Specific movements, like lifting your leg while you lie flat on your back, can reveal if a nerve is being pinched—a classic sign of a herniated disc or sciatica.

This hands-on evaluation often gives us more than 90% of the information needed for an accurate diagnosis, all without needing any advanced imaging.

When Is Imaging Truly Necessary?

It’s a common misconception that everyone with back pain needs an MRI or X-ray right away. In reality, for most cases of acute mechanical pain, imaging isn’t necessary at first and won't change the initial course of treatment.

However, imaging becomes a crucial tool when certain conditions are met. We typically order scans only if you have pain that just won’t improve, clear nerve-related symptoms like progressive weakness, or any of the "red flag" symptoms we discussed earlier.

An X-ray is excellent for looking at bones and can reveal issues like fractures, arthritis, or spondylolisthesis. An MRI, on the other hand, gives us a detailed look at soft tissues, making it the gold standard for diagnosing herniated discs, spinal stenosis, and nerve compression.

Your body tells a story. A skilled diagnosis is about learning to read that story—combining your history with a physical exam to pinpoint the problem before turning to technology. Imaging confirms the diagnosis; it doesn't make it.

This deliberate approach helps avoid unnecessary procedures and focuses treatment exactly where it’s needed most. Once we have a confirmed diagnosis, we can move forward with a targeted, non-surgical treatment plan.

Evidence-Based Non-Surgical Treatments

At Bonesetters Chiropractic, our philosophy is to use precise, evidence-based therapies to correct the underlying cause of your pain. Here are three key modalities we use to create genuine, long-term healing:

  1. Spinal Decompression: Think of this as creating space for your spine to breathe and heal. This therapy gently stretches the spine, which creates negative pressure inside the discs. This subtle vacuum effect can help draw a bulging or herniated disc back into place while pulling in nutrient-rich fluids to promote healing. It is an extremely effective, comfortable, and safe alternative for many people facing the prospect of surgery.

  2. PulStar Computer-Guided Adjustments: This system brings an incredible level of precision to chiropractic care. Instead of traditional manual adjustments, the PulStar uses a handheld device to send gentle impulses into the spine. A sophisticated computer program analyzes the feedback from each vertebra to find areas of restricted movement, allowing for incredibly precise and gentle adjustments without any popping or cracking.

  3. Class IV Cold Laser Therapy: This is where healing happens at a cellular level. The therapy uses specific wavelengths of light that penetrate deep into injured tissues. This light energy stimulates cellular repair, reduces inflammation, and increases blood flow to the affected area. It’s a completely painless way to accelerate your body's natural healing process for both acute injuries and chronic conditions.

These methods, often used in combination, create a powerful synergy. They don't just alleviate pain; they work to restore function and stability to the spine, setting the stage for lasting relief.

Your Path to Lasting Relief Starts Now

You don't have to just "live with" lower back pain. We've walked through the specific, identifiable causes, and more importantly, the effective solutions available. The single most important takeaway? An accurate diagnosis is everything. It's the essential first step that saves you from the frustrating cycle of pain that never quite goes away.

Two medical professionals discuss medical scans on a computer for an accurate diagnosis.

True, lasting relief isn't about masking symptoms; it’s about fixing the root of the problem. That means we have to look deeper than the surface-level ache to understand the specific mechanical or structural issue causing your pain. For some, recovery involves more than just treatment in a clinic. Managing chronic conditions or recovering from severe strain might mean looking into options like specialized hospital beds to provide crucial support at home.

Take Control of Your Recovery

Knowing what causes back pain is one thing, but taking action is what truly sparks change. The most powerful path to recovery is combining professional care with proactive things you can do yourself.

A huge piece of that puzzle is strengthening your core. To get started, check out our guide on the best exercises for lower back pain relief.

Your journey back to a pain-free life begins with one decision: to seek expert care. An evidence-based, personalized approach ensures you're not just getting temporary relief but building a stronger, more resilient back for the future.

If you're ready to stop letting back pain run your life, it's time to take the next step. Schedule a consultation at Bonesetters Chiropractic. Let's work together to restore your mobility, regain your strength, and help you reclaim a life without limitations.

Your Questions About Lower Back Pain, Answered

When you're dealing with back pain, a million questions can run through your mind. Let's tackle some of the most common ones we hear from patients every day. Getting clear, straightforward answers is the first step toward feeling confident about your path to recovery.

Is This a Pulled Muscle or a Slipped Disc?

It’s one of the biggest questions people have, and while it’s easy to get them confused, their classic symptoms feel quite different.

A muscle strain usually feels like a localized, dull ache or a deep soreness right in your lower back. You’ll notice it gets worse when you bend or twist, and it often feels a lot better when you rest. Think of it as a grumpy, over-worked muscle complaining when you ask it to do something.

A disc problem, on the other hand, tends to be much louder and more dramatic. If a disc is bulging or herniated and pressing on a nerve, the pain is often sharp and intense. The tell-tale sign is sciatica—that searing, shooting pain that can travel from your back, through your glutes, and down your leg. Numbness, tingling, or even weakness in your leg can also tag along. These clues are a great starting point, but only a proper exam can pinpoint the exact cause.

When Is Back Pain an Emergency?

Most of the time, back pain gets better on its own within a few weeks. But sometimes, it's a signal of something more serious that needs immediate attention. You should see a doctor right away if your pain comes with any of these red flags:

  • Loss of control over your bladder or bowels
  • Weakness in your legs that is getting progressively worse
  • Numbness in the groin or "saddle" area (the parts that would touch a saddle)
  • Unexplained weight loss or a fever that won't go away

Also, if your pain started after a major trauma like a car accident or a bad fall, don't wait. And if your pain simply isn't getting better after a couple of weeks of taking it easy, it's time to get it checked out by a professional.

Think of your body as an expert communicator. Sharp, radiating pain or neurological symptoms like numbness are clear signals that a nerve is involved and requires prompt professional assessment.

Is It Safe to Get a Chiropractic Adjustment for a Herniated Disc?

Absolutely—as long as it’s done by a skilled practitioner using the right techniques. The old-school image of forceful twisting and cracking isn’t what modern, evidence-based chiropractic care is about, especially for a sensitive issue like a herniated disc.

Gentle, precise approaches are the key. For instance, the computer-guided PulStar system we use at Bonesetters delivers targeted adjustments without any popping or twisting. We can focus exactly where the problem is. When we combine this with treatments like spinal decompression, we can gently relieve the pressure on the nerve and create an environment where the disc can finally begin to heal. It’s a powerful and effective way to get relief without resorting to more invasive options.


At Bonesetters Critical Chiropractic, we believe a precise diagnosis is the foundation of lasting relief. If you're ready to move beyond guessing and find a real solution for your lower back pain, schedule your consultation today.



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