Should You Use Heat or Ice? A PT Explains
The answer depends on your injury type and how long you've had it. Here's the evidence-based guide physical therapists use to decide.
March 15, 2026
“Should I put ice on it or heat?” It’s the most common question physical therapists hear. And the answer matters more than you’d think.
The Short Answer
When to Use Ice
Ice constricts blood vessels and reduces inflammation. Use it when:
- You just tweaked, sprained, or strained something
- There’s visible swelling or bruising
- The area is warm to the touch
- Pain is sharp and recent
How: 15-20 minutes on, at least 45 minutes off. Always use a barrier between ice and skin. Frozen peas work great.
The catch: The RICE protocol (Rest, Ice, Compression, Elevation) has been updated. Research now supports PEACE & LOVE — Protection, Elevation, Avoid anti-inflammatories, Compression, Education in the first days, then Load, Optimism, Vascularisation, Exercise for recovery.
When to Use Heat
Heat increases blood flow and relaxes tight tissue. Use it when:
- You have chronic muscle tightness or stiffness
- Pain is a dull ache, not sharp
- Your back is stiff in the morning
- You’re warming up before exercise or stretching
How: 15-20 minutes with a heating pad, warm towel, or hot shower. Moist heat penetrates deeper than dry heat.
Don’t use heat on: Fresh injuries with swelling, open wounds, or areas with poor circulation.
The Contrast Method
Some PTs recommend alternating heat and cold for chronic conditions. Three minutes of heat followed by one minute of cold, repeated three times. This “pumping” action can help reduce chronic swelling and promote healing. Ask your PT if this is appropriate for your condition.
When Neither Is the Answer
For most musculoskeletal pain, movement is the best treatment. Ice and heat can provide temporary relief, but they don’t fix the underlying problem.
If your pain has lasted more than a few days, the right exercises will do more than any ice pack. Take our free quiz to find the exercises that match your specific condition.
Dr. Marcus Rivera
DPT, SCS
Sports clinical specialist with 12 years of experience treating acute and chronic musculoskeletal injuries.