Pain Science 101: Why Your MRI Isn’t the Whole Story

As a physical therapist, I’ve lost count of how many conversations start like this:

“My MRI is terrible.”

“My back is degenerating.”

“My doctor said my spine is basically crumbling.”

“I guess this is just what happens when you get older.”

And then I look at the MRI report and see the same things I’d expect to find in about half the people standing in line at Costco.

Bulging discs. Arthritis. Degeneration.

Welcome to being a human with birthdays. We call these "internal wrinkles".

Now before the internet grabs their pitchforks: yes, structural problems absolutely matter sometimes. There are legitimate injuries, tears, fractures, nerve compressions, inflammatory conditions, and surgical cases.

But modern pain science has taught us something important:

Pain is not simply a measure of tissue damage.

That idea comes largely from the work of prominent clinicians and educators such as: Lorimer Moseley, David Butler, and Adriaan Louw — people who have spent decades helping clinicians and patients better understand pain.

And honestly? Understanding pain differently can completely change recovery.

Pain Is More Like an Alarm System Than a Damage Meter

The easiest way I explain pain to patients is this:

Pain is like a smoke alarm.

A smoke alarm’s job is not to measure damage. Its job is to detect possible danger and scream at you.

Sometimes there’s a real fire.

Sometimes someone burned popcorn.

Sometimes the battery is dying, and it starts chirping at 2 AM because apparently smoke detectors are emotionally abusive.

Your nervous system works similarly.

Your brain is constantly scanning for danger:

• Threats

• Stress

• Injury

• Fear

• Poor sleep

• Illness

• Fatigue

• Previous painful experiences

  
  

And if your brain decides you need protection? It creates pain.

That pain is real. Very real. But it does not always mean your body is actively being damaged.

“But My MRI Showed…”

One of my favorite patient interactions ever went something like this:

Patient:

“My MRI says I have degeneration at multiple levels.”

Me:

“Congratulations. You also probably have wrinkles and taxes too.”

(This was a patient I knew well, and it was very lighthearted...I promise!)

They laughed, then I explained:

If we MRI enough people over 30 years old, we’ll find “abnormalities” everywhere — even in people with zero pain.

That’s one of the biggest problems in healthcare right now:

• People get imaging -> Imaging finds normal age-related changes

• Those findings get interpreted as catastrophic -> Fear goes through the roof

• Movement decreases -> Pain often gets worse

  
  

Now the nervous system thinks:

“Whoa. We must be fragile.”

And the alarm system turns up even louder.

The Brain Loves Context

Pain is influenced by way more than tissues.

I’ve seen patients experience pain flare ups from:

• Changes in sleep

• Periods of stress

• Anxiety

• Prolonged sitting

• Poor water intake

• Doom-scrolling WebMD at midnight

• Their in-laws visiting for a week...

  
  

Okay… maybe that last one isn’t officially in the research. But you get the point.

Pain is a multi-factorial experience. Your body, brain, emotions, stress levels, beliefs, environment, and previous experiences all contribute to the final output.

That’s why two people can have the exact same MRI findings and completely different pain experiences.

One person says:

“Yeah my back is a little stiff.”

The other says:

“I sneezed and saw God.”

Same scan. Different nervous system response.

Why Quick Fixes Often Become Long-Term Problems

This is where things get messy.

A lot of healthcare still treats pain like this:

Pain = damaged tissue. Therefore:

• medicate it

• inject it

• cut it out

• immobilize it

• 
  

And again — sometimes those interventions are absolutely necessary.

But persistent pain is often more complex than that.

If someone:

• Sleeps 4 hours a night

• Barely moves

• Is terrified of bending

• Eats like a raccoon behind a gas station

• Lives in chronic stress

• Has been told their body is “falling apart”

  
  

…then an injection alone probably isn’t fixing the root issue.

You can temporarily quiet the alarm without addressing why the alarm became sensitive in the first place.

Fear Avoidance: The Sneaky Pain Multiplier

One of the biggest things I see clinically is fear avoidance.

Pain begins...then the person becomes afraid to move because they think movement equals damage.

So they stop:

• exercising

• bending

• lifting

• walking

• living normally

  
  

Which sounds protective…but often leads to:

• weakness

• stiffness

• deconditioning

• increased sensitivity

• hypervigilance

  
  

The nervous system essentially says:

“Wow, if we’re avoiding movement this much, movement must be dangerous.”

And the alarm sensitivity increases even more.

I explain this to patients all the time:

Your body adapts to what it repeatedly experiences.

If the body repeatedly experiences safety, confidence, movement, and resilience…

…it usually becomes less protective over time.

Movement Is Medicine

One of the hardest truths for patients to hear is this:

The path out of pain is often not complete rest...It’s appropriate movement.

Not “ignore pain and deadlift a truck.”

But graded, intelligent, progressive movement that teaches the nervous system:

“Hey, this is safe again.”

That’s one reason education matters so much.

Adriaan Louw’s research has shown that simply understanding pain differently can reduce fear and improve outcomes.

Because when people stop interpreting every ache as damage, they stop living like they’re made of glass.

I highly recommend this book written by Adriaan Louw on pain science education for a complete, and easy-to-understand explanation of all of this and more.

My Goal as a PT Isn’t Just to Reduce Pain

It’s to reduce fear.

To improve confidence.

To restore movement.

To help patients understand their body is adaptable, resilient, and capable of change.

Sometimes the problem is tissue damage.

Sometimes it’s nervous system sensitivity.

Most of the time?

It’s a combination of both.

That’s why good rehab shouldn’t just focus on:

• exercises

• stretches

• modalities

  
  

It should also address:

• sleep

• stress

• recovery

• beliefs

• movement confidence

• lifestyle habits

• education

  
  

Because humans are not car engines. You can’t fix persistent pain by replacing one part and calling it a day.

Final Thoughts

Pain is real.

But pain is also complicated.

If you’ve been stuck in a cycle of:

• repeated imaging

• repeated medications

• repeated procedures

• repeated frustration

  
  

…it may be time to stop asking only:

“What tissue is damaged?”

…and start asking:

“Why has my nervous system become so protective?”

That question tends to lead to much better answers.