Common Causes of Lower Back Pain (and How to Fix Them)

Low back pain is one of the most common reasons people walk into our clinic. If you’re dealing with it, you probably want two answers: why does my back hurt, and what will actually fix it?

The answer is usually not “you got unlucky.” Most lower back pain comes from a few common causes: how you sit, how you move, and what the rest of your body is (or isn’t) doing to support your spine. Below, we break down the most common causes we see in our Fort Myers and Cape Coral clinics, the warning signs that need a doctor right away, and what lasting relief looks like.

Why the Lower Back Takes So Much Stress

Your lower back sits right in the middle of your body. It takes force from above (your trunk, arms and whatever you’re carrying) and from below (every step you take on the ground).

When the joints above and below it, such as your mid-back, hips and feet, stop moving well, the lower back picks up the slack. Over time it gets overloaded and starts to complain. That’s why, in our clinic, we often say your lower back is where the problem shows up, not always where it starts.

Acute vs. Chronic Back Pain

• Acute back pain comes on suddenly, often after lifting, twisting or a long day of yard work, and usually settles within a few weeks.
• Chronic back pain lasts longer than about 3 months, or keeps coming back. This is the pattern that tells us something underneath hasn’t been addressed.

Both are common, and both respond well to the right plan. Chronic pain just takes a more thorough look at why it keeps returning.

The 6 Most Common Causes of Lower Back Pain

1. Sitting Posture

Long hours at a desk, in the car or on the couch put steady pressure on the discs and the muscles of the lower back. Slumping, or sitting in the same position for too long, is one of the most common triggers we see. If sitting is your main issue, read why your lower back hurts when you sit.

2. Weakness and Tightness

A weak core, combined with a stiff mid-back and tight hips, forces the lower back to do work it wasn’t built to do alone. This is often the real reason pain keeps coming back after rest or pills.

3. How You Bend and Lift

Picking up a grandchild, hauling groceries, a heavy deadlift at the gym, or even reaching for a sock can strain a muscle or joint if the movement pattern is off. It’s rarely one lift. Usually it’s the hundredth repetition of a poor pattern.

4. Disc Irritation

Discs are the cushions between your vertebrae. They tend to get irritated with lots of prolonged sitting and repeated bending, and in people who are very flexible. When a disc presses on a nerve, you may feel pain, tingling or numbness down the leg. Learn more about herniated discs and lower back pain.

5. Facet Joint and Arthritis Changes

The small joints at the back of the spine (facet joints) can become irritated with arthritis. This kind of pain is often worse after standing or walking for a long time.

6. Age-Related Spine Changes

As we age, discs lose height and the openings for the nerves can narrow. Spinal stenosis is common in adults over 50: it’s typically worse when standing or walking and better when sitting or bending forward. Read everything you need to know about spinal stenosis.

Lifestyle plays a role too. Smoking, carrying extra weight, and being either very inactive or overdoing it all raise the risk of back pain.

When Back Pain Needs a Doctor Right Away

Not all back pain comes from muscles and joints. Problems with organs, like the kidneys or pancreas, can also cause pain in the back. See a doctor promptly if you have:

• Loss of bladder or bowel control, or numbness in the groin or inner thighs
• Back pain with fever, chills or unexplained weight loss
• Severe pain after a fall or car accident
• Weakness in a leg or foot that is getting worse
• Pain that doesn’t change at all with position or movement

How We Find (and Fix) the Real Cause

At Back In Motion, every visit is one-on-one with a Doctor of Physical Therapy. With The Gray Method™, we don’t just look at where it hurts. We check how your mid-back, hips and feet move, because that’s often where the overload starts.

• Find the cause: a full movement and strength assessment, not just a look at the sore spot.
• Calm it down: hands-on care and the right movements to settle pain without surgery or pills.
• Build it back: strength and movement training so you can sit, lift, golf, garden and play without it coming back.

See how our back pain relief program works, and if you want to stay active while you heal, read how to train with back pain safely.

Frequently Asked Questions

What is the most common cause of lower back pain?

For most active adults, it’s a mix of long sitting, a weak core, and stiff hips or mid-back that overload the lower back, rather than one single injury.

Do I need an MRI for back pain?

Not usually. Most back pain improves with the right assessment and treatment. Imaging is helpful when there are red flags or when symptoms aren’t improving as expected.

Can physical therapy help chronic back pain?

Yes. Chronic pain often keeps returning because the cause was never treated. A plan that addresses how your whole body moves gives you the best chance of lasting relief.

Fix the Cause of Your Back Pain

If back pain keeps coming back, it’s time to find out why. Start with our Fixing the Cause & Not Just the Symptoms Assessment, or Inquire About an Appointment →

Call our office at (239) 223-0484 to schedule your appointment.