Ice or heat?

Medically reviewed by Kristian Tarong, DC on September 17, 2026

Everyone has a firm opinion. The evidence is softer than the opinions.

Ice is usually reached for in the first day or two after a sudden strain, heat for ongoing stiffness. The research is less clear-cut than the confidence people have about it, and comfort is a reasonable guide.

Fifteen minutes

Either one, then a break. Longer is not better.

Always use a barrier

Never put ice or a heat source on bare skin.

Go with what helps

Ice for acute injuries, heat for more chronic or subacute injuries.

How long does it usually last?

Either is a short-term comfort measure, not a fix. If you are still reaching for it daily after two weeks, the underlying issue has not settled and is worth having looked at.

When should you see someone?

• Still needing ice or heat daily after two weeks
• Pain that wakes you at night
• Numbness or tingling down a leg
• Weakness in a leg or foot
• Redness, swelling, or warmth that keeps increasing

How do you keep it from coming back?

• Use either as comfort, not as the plan
• Keep moving gently alongside it
• Fifteen minutes at a time with a barrier on the skin
• Do not use heat on a fresh swollen injury

Should I use ice or heat for back pain?

Ice is generally used in the first day or two after a sudden strain, heat for ongoing stiffness. The evidence for both is modest, so comfort is a reasonable guide.

How long should I apply ice or heat?

About fifteen minutes at a time, always with a barrier against the skin. Longer is not better.

Can I use both?

People often do, heat before movement and ice after activity that aggravated things. Neither fixes the problem on its own.

When should I stop relying on ice or heat?

If you still need it daily after two weeks, the underlying issue has not settled and is worth an in-person evaluation.