02/23/2026
If you’ve ever had low back pain that feels very specific…
👉 one side only
👉 deep in the dimple area
👉 sometimes into the glute
👉 worse rolling in bed or getting out of the car
There’s a good chance your SI joint is involved.
Let’s break this down clearly.
📍 What Is the SI Joint?
The sacroiliac joint (SI joint) connects your:
Sacrum (the triangular bone at the base of your spine)
to
Ilium (the large pelvic bones on each side)
You have two of them — one on each side.
They are not meant to move much.
They are meant to:
Transfer force between your spine and your legs
Stabilize your pelvis during walking
Absorb load when you bend, lift, or twist
The SI joint is held together by very strong ligaments. It’s built for stability, not mobility.
And that’s exactly why it becomes painful.
🤔 Why Does SI Joint Pain Happen?
The SI joint hurts for one of two main reasons:
1️⃣ It’s moving too much
(Ligament irritation)
This can happen with:
- Pregnancy / postpartum
- After a fall
- After heavy lifting
- With unstable hips or weak glutes
- In people who sit long hours
The ligaments become irritated and inflamed.
Pain is usually:
- One-sided
- Sharp or burning
- Worse with rolling in bed
- Worse with standing from sitting
- Worse climbing stairs
2️⃣ It’s not moving well
(Force transfer problem)
If your hips are stiff
If your thoracic spine doesn’t rotate well
If one leg is stronger than the other
The SI joint becomes the “compensator.”
It absorbs stress it wasn’t meant to.
That irritation builds up over days or weeks.
🚨 What SI Joint Pain Is NOT
It’s not usually:
- A disc herniation
- Sciatica down the leg
- A “bone out of place”
Sometimes it can refer into the glute or upper hamstring, but it rarely travels below the knee.
🧠 How I Approach SI Joint Pain in the Clinic
This is where experience matters.
Because you don’t treat the SI joint directly.
You treat:
- The glutes
- The deep rotators
- The hip flexors
- The QL
- The surrounding fascial tension
Sometimes we use:
- Focused manual therapy
- Myofascial techniques
- RAPID Neurofascial Reset
- Specific stabilization work
But here’s the key:
👉 If it’s unstable — we stabilize it
👉 If it’s stiff — we restore movement above and below it
I am interested in restoring proper load transfer so it stops getting irritated.
🏋️♂️ What You Might Be Prescribed
Depending on what I find:
- Glute activation drills
- Core stability work (not sit-ups)
- Gentle extension bias work
- Hip mobility work
- Walking progression
- Modified strength training
Massage alone will not fix chronic SI pain.
But the right combination of:
✔ targeted treatment
✔ smart movement
✔ load management
…very often does.
⏳ When Should You Get It Looked At?
If your low back pain:
- Has lasted more than 7-10 days
- Is not improving
- Keeps coming back
- Is affecting sleep
- Makes getting out of the car painful
- Feels very one-sided
It’s time to stop guessing.
The longer irritated ligaments stay irritated, the more sensitive the nervous system becomes.
Early treatment = faster resolution.
📍 Final Thought
The SI joint is small.
But when it’s angry, it can make life miserable.
The good news?
It responds extremely well to the right approach.
If you’re dealing with one-sided low back pain and it’s not settling down, let’s assess it properly and build a plan.
Don’t let a small joint dictate your life.