Stop what you’re doing. Put the ice down.
We’ve all been taught to reach for the frozen peas the moment something snaps, sprains, or hurts. It’s muscle memory. Decades of orthopedic advice drilled it into us: ice it.
But new preclinical data suggests you might be prolonging your own misery.
Natasha Trentacosta, an orthopedic surgeon who works with Angel City FC, says the debate is old hat. She’s seen it coming for a while. The new twist? Mice. Yes, mice.
A study out of McGill University put little lab mice in pain. Then they iced them. Specifically, cryotherapy over three days. The result? Pain didn’t fade in fifteen days like expected. It lasted over thirty.
Other treatments failed too. Heat? Menthol? Hot-and-cold alternation? Useless. The lead author, Lucas Vasconcelos, concluded we need to rethink acute inflammatory injury management.
Sounds radical. Should you throw out your freezer gel pack? Not quite yet. It was a mouse study. Humans are not tiny rodents with complex psychological states about paw pressure. We report pain verbally. Mice twitch.
The debate of whether to ice or not is longstanding
But the biology offers a clue.
Lima explains the mechanism simply. Icing reduces local blood flow. It slows inflammatory activity. Here’s the catch: inflammation isn’t just a bug. It’s a feature.
Kyle Lau, a physician at UCLA Athletics, agrees. Inflammation starts the recovery cascade. If you chill it out too hard, you stall the engine. You delay the healing. Pain stays longer because the body is confused about whether it should fix the tissue or freeze it.
Why did we buy the ice story in the first place?
Swelling.
Trentacosta notes ice is a vasoconstrictor. It narrows vessels. Less blood means less immediate bleeding and less fluid accumulation in those critical first moments. Swelling presses on nerves. It cuts off oxygen to tissues. That limits mobility and hurts more. Ice numbness is a gift in that brief window. You stop screaming. You move a little.
There is nuance here, obviously.
Lau suggests a narrow window. Maybe the first six hours? Use ice to blunt the initial shock and swelling. But after twelve hours? The clock might tick against you. You’re now fighting your body’s natural repair crew.
If you do ice, do it smart. Ten to twenty minutes max. Wrap that bag in a damp cloth. Never put ice directly on skin. You will get frostbite. That adds a whole new layer of damage.
Don’t banish the cold entirely. It has a place. It tames the immediate chaos of injury.
But maybe stop using it like a magic eraser for all pain. Your body wants to inflame. It needs the heat to fix itself.
Just listen to it. Or maybe listen to the mice.
