06/05/2026
This is why your joints feel stiff, painful, and start to grind.
What you’re seeing is cartilage loss.
On the left is a normal joint.
On the right is one affected by osteoarthritis.
Normally, cartilage is smooth.
And allows bones to glide.
Without friction.
But over time,
That cartilage wears down.
The surface becomes rough.
And uneven.
Eventually,
Bone starts to rub against bone.
This creates friction.
And inflammation.
That’s why you feel stiffness.
And pain with movement.
Sometimes even grinding.
This is not just aging.
It’s structural breakdown.
That change you’re seeing
Is exactly why joint pain develops.