Should You Use Ice or Heat For Injury
Many people ask trainers and coaches all the time: “Should I use ice or heat after I injure myself?” It’s a simple question but the answer depends on what kind of injury you have and when it happened.
In this article, you’ll learn:
when ice is most effective
when heat helps the injury heal
how to apply each safely and effectively
Using the right treatment at the right time helps you recover faster and get back to training without unnecessary pain or swelling.
R – Rest
I – Ice
C – Compress
E – Elevate
This was common practice for decades in school gyms, professional sports, and everywhere in between. However, through research studies, we have discovered there is a more efficient and effective way to recover from many injuries.
Now, we recommend heat, movement, and electrical stimulation instead of using ice or heat as part of RICE.
Note that you should always follow your doctor’s instructions. For instance, if you are told not to jump up and down using your injured ankle, then don’t do it. Be smart.
Evidence-Based Guidelines: When to Ice vs Heat
Here’s what research and clinical guidelines show:
Use Ice When:
The injury is acute (within the first 24–72 hours) – bumps, sprains, strains, swelling, and sharp pain respond best to cold initially. Ice reduces inflammation by narrowing blood vessels and numbing pain.
Apply cold for 10–20 minutes at a time with a barrier (like a towel) to protect skin.
Use Heat When:
The initial swelling has gone down and the injury feels stiff or achy. Heat increases blood flow, relaxes muscles, and can improve tissue flexibility.
Heat helps with chronic or lingering soreness that lasts longer than a few days.
Do Not Use Heat:
During the first days after an injury, it can increase inflammation and delay recovery.
Quick Rules:
Ice first, then heat later once swelling has decreased.
Always use a towel between your skin and the cold or heat source.
What the Science Says
While both ice and heat are widely used, research suggests that ice is most helpful right after a new injury, and heat becomes useful later to relax tissues and improve blood flow, especially for stiffness and chronic discomfort.
New Treatment Methodology
Heat helps to dilate blood vessels which enables more oxygen to reach the injured area. Oxygen improves your recovery time. Heat also helps to relax injured muscles and improve flexibility. It is often used in conjunction with electrical stimulation.
Movement is important because it helps drive blood to the muscle, again, aiding in recovery. Unlike with RICE, careful activity is recommended because it also prevents stiffness.
Electrical Stimulation causes non-fatiguing contractions in muscle tissue, which increases blood flow to the injured area. E-stim can often be used to improve range of motion and muscle control even when you can not put a lot of pressure on the injured area like standing would do. This can be done by using a transcutaneous electrical nerve stimulation or TENS unit.
TENS units have become commonplace, with many people having one in their home. They can be used on most parts of your body, with only a few exceptions: the front or sides of your neck, your mouth or eyes, your temples, on varicose veins, numb areas, or irritated or broken skin, or simultaneously on your chest and back. Be sure to follow the instructions.
To further expedite recovery from injury and exercise, take this daily. It also helps prevent muscle deterioration and assists with gastrointestinal health.
What to Expect With Ice or Heat
After icing, you should feel less swelling and reduced pain within a few hours. Repeat 2–3 times daily in the first 1–3 days.
After applying heat later on, you should notice less stiffness and better movement within a few days.
If pain or swelling gets worse or doesn’t improve in 5–7 days, talk to a medical professional.
