Should you ice an injury?
New research says it depends.
For years, ice has been one of the most common go-to treatments for pain, swelling, soreness, and injury. Rolled an ankle? Ice it. Sore after a run? Ice it. Tweaked your back? Ice it.
But new research suggests that icing may not always be the best first response—especially when it comes to how the body naturally heals.
Researchers from McGill University and Queen's University studied how icing affected pain duration in mice with two different inflammation-related injuries. One of the injury models was designed to mimic muscle soreness. The mice were treated with ice over three days using different timing schedules, and researchers tracked how long they showed signs of pain sensitivity.
The results were surprising: cryotherapy, or cold therapy, approximately doubled the length of pain—from about 15 days to more than 30 days.
So why might that happen?
The researchers believe it may have to do with the body's early immune response. When an injury occurs, certain white blood cells called neutrophils rush to the area as part of the body's first wave of healing. When researchers injected neutrophils into the paws of mice that had been iced, it prevented the pain from becoming prolonged.
This suggests that early inflammation may not be something we always want to completely shut down. Inflammation is often uncomfortable, but it is also part of the body's natural repair process.
That does not mean ice is bad or that you should never use it. Ice can still be helpful for acute injuries, significant swelling, or when short-term pain control is needed. The key is using it strategically rather than automatically reaching for an ice pack for every ache, soreness, or minor strain.
For mild soreness or stiffness, other recovery strategies may be helpful, including gentle movement, stretching, mobility work, good hydration, proper nutrition, and quality sleep. Heat may also help relax tight muscles and improve circulation when appropriate.
This research also fits with earlier findings suggesting that aggressively suppressing inflammation with medications like NSAIDs or steroids too early may sometimes provide short-term relief but potentially slow full recovery.
The takeaway? Recovery science is evolving. Ice is not the enemy, but inflammation is not always the enemy either. Sometimes the body needs a healthy inflammatory response to repair and recover properly.
At Harvard Square Chiropractic, we help patients understand what their pain may be coming from and what recovery strategies make the most sense for their specific situation. Whether you are dealing with a new injury, post-workout soreness, stiffness, or recurring pain, we can help you move better, reduce irritation, and support long-term healing.
Not sure whether to ice, heat, stretch, rest, or get checked?
Schedule an appointment with Harvard Square Chiropractic and let's help you recover the right way.
