How to Use an Ice Pack for an Acute Injury (RICE Protocol Updated)

The old RICE protocol (Rest, Ice, Compression, Elevation) has been revised by current evidence. The new consensus: ice helps in the first 48-72 hours; prolonged rest beyond a few days actually slows recovery; gentle movement and progressive loading speed healing.

For the cold therapy piece specifically (the I in RICE), getting the technique right matters. This walkthrough covers how to use ice for the most common acute injuries: ankle sprains, mild muscle strains, contusions, and post-surgical recovery.

What you need

• A reusable gel ice pack. The FlexiKold medium is our top pick because it stays flexible at freezer temperature.
• A thin cotton towel or pillowcase as a barrier
• A way to elevate the injured area
• An optional compression bandage (ACE wrap)

The full protocol for the first 48-72 hours

Step 1: Get the area elevated

Before applying ice, elevate the injured area above the level of your heart. For an ankle sprain: lie on a couch with the injured leg propped on pillows. For a wrist injury: rest your arm on a pillow at chest height while sitting.

Elevation works with gravity to reduce swelling. Doing ice without elevation reduces 30-40% of the benefit.

Step 2: Wrap the ice pack

Take the gel pack from the freezer. Wrap it in a thin cotton towel or pillowcase. The barrier should be:

• One layer thick
• Cotton or similar absorbent fabric (not nylon or polyester)
• Clean and dry

Never apply the ice pack directly to skin. The pack is below freezing; direct contact can cause cold burns within 5-10 minutes.

Step 3: Apply for 15-20 minutes

Position the wrapped ice pack over the injured area. Press gently if there’s no contraindication (no significant pain from the pressure).

15-20 minutes is the therapeutic window. Less than 15 minutes is insufficient; more than 20 minutes triggers vasoconstriction rebound (the blood vessels constrict during ice, then dilate excessively after, increasing swelling).

Set a phone timer. Don’t fall asleep with the pack on.

Step 4: Remove and rest for at least 1 hour

After 20 minutes, remove the pack. Continue to elevate the area, but let the tissue rewarm to normal body temperature before the next session.

Minimum 1 hour between sessions. Repeated sessions without adequate rest can cause tissue damage.

Step 5: Apply mild compression between sessions

Between ice sessions, mild compression with an ACE wrap helps prevent re-swelling. Wrap firmly enough to feel snug, loosely enough that you can fit a finger between the wrap and the skin.

Don’t wrap so tight that you cut off circulation. Check for color changes in the fingers or toes below the wrap; if they’re blue or pale, the wrap is too tight.

Step 6: Repeat 3-4 times per day

For the first 48-72 hours after the injury, repeat the ice-rest-compression cycle 3-4 times per day. After 72 hours, the acute phase typically ends and the protocol shifts.

When to start moving

Modern protocol replaces prolonged rest with progressive movement. Starting around 48-72 hours after the injury (sooner for mild injuries, later for more severe), gentle movement begins:

• Ankle sprain: Gentle ankle circles, alphabet tracing with the toe. No weight bearing yet for moderate sprains.
• Mild muscle strain: Light isometric contractions (tightening the muscle without movement). Progress to gentle movement through pain-free range.
• Bruise or contusion: Gentle movement of surrounding joints. The bruise itself doesn’t need movement.

Movement increases circulation, which speeds healing. The old “rest for 5-7 days” approach has been replaced with “start moving within 48-72 hours when pain allows.”

Heat can be added after the acute phase (typically day 3-5) for muscle stiffness, while ice remains the right choice for any return of swelling.

What ice won’t do

Setting expectations:

• Won’t fix the injury. Ice reduces pain and swelling; it doesn’t repair tissue. Healing happens regardless of icing, faster with appropriate movement after the acute phase.
• Won’t substitute for medical care for serious injuries. Significant bruising, inability to bear weight, deformity, or numbness require professional assessment.
• Won’t help chronic conditions. Ice is for acute issues. Chronic muscle tightness usually responds better to heat.

When to NOT use ice

Some situations where ice is contraindicated:

• Reduced skin sensation. Diabetic neuropathy, peripheral artery disease, Raynaud’s. The cold can cause damage you can’t feel.
• Cold urticaria. Some people develop hives from cold exposure. Avoid ice if you have this.
• Open wounds. Ice can interfere with wound healing.
• Tissue with very compromised circulation. Severe peripheral vascular disease, recent vascular surgery.

When in doubt, ask your provider.

Signs of cold injury

Stop applying ice and warm the area if you notice:

• Skin that’s white, gray, or waxy in appearance (frostbite-like)
• Numbness that persists after the ice is removed
• Sharp pain that worsens after removal (not the typical dull warming sensation)
• Skin that doesn’t return to normal color within 10-15 minutes

These suggest cold injury. Warm the area gradually (lukewarm water, not hot) and avoid further cold exposure to that area for several days.

For post-surgical recovery

For recent surgery (knee replacement, ACL reconstruction, shoulder surgery, etc.), follow your surgeon’s specific cold therapy protocol. Common patterns:

• Continuous cold for the first 24 hours (often via a rented cold-water-circulating unit; gel packs are a backup)
• 20-30 minutes per session, 5-8 sessions per day for the first week
• Reducing frequency over weeks 2-6 of recovery

Surgical cold therapy is more intensive than acute injury cold therapy. Follow specific guidance from your surgical team.

For specific injuries

Ankle sprain

• Elevate ankle above heart
• Wrapped ice pack on lateral ankle joint (where most sprains occur)
• 20 minutes, 3-4x per day for 48-72 hours
• Compression with ACE wrap between sessions
• Progress to gentle ankle circles around day 2-3
• See a provider if you can’t bear any weight after 48 hours

Mild muscle strain (hamstring, calf, etc.)

• Elevate the limb
• Wrapped ice pack covering the strained area
• 20 minutes, 3x per day for the first 48 hours
• Gentle stretching beginning day 2-3
• Progressive return to activity over 1-2 weeks
• See a provider if significant bruising or weakness persists

Contusion (bruise)

• Wrapped ice pack on the bruised area
• 20 minutes, 2-3x per day for 24-48 hours
• After 48 hours: heat is often more comfortable than continued ice
• Bruising will discolor over 1-2 weeks regardless of icing

Post-workout muscle soreness

Generally not the right use case for ice. Mild post-workout soreness responds better to heat, stretching, and gentle movement. Reserve ice for actual injuries (sharp pain, swelling) rather than typical DOMS (delayed onset muscle soreness).

For our gear recommendation

See our FlexiKold review for the top reusable ice pack pick, Best Ice Packs of 2026 for the broader category, and Best Ice Packs for Migraines for the migraine-specific use case.

Final word

For acute injuries, ice in 15-20 minute sessions with at least 1 hour between, combined with elevation and mild compression, reduces swelling and pain meaningfully during the first 48-72 hours.

Always use a barrier between the pack and skin. Never sleep with a pack on. Stop and warm the area if you see signs of cold injury.

The old RICE protocol has been updated: ice for 48-72 hours, then transition to gentle movement and progressive loading. Prolonged rest beyond a few days slows recovery in most acute injuries.

For significant injuries (can’t bear weight, deformity, numbness, severe swelling), see a provider. Self-care has limits, and serious injuries benefit from early assessment and treatment.