How to Treat a Poison Ivy Rash

Summary

Safety first

• Stop immediately if you develop difficulty breathing or swelling of the face—seek emergency help if possible.
• Do not scratch, as this can lead to infection.
• Use precious drinking water only if necessary to clean affected skin.
• If rash covers a large area or you feel faint, consider ending your hike early.

Tools you’ll need

• basic first aid kit
• bottle of water (if available)
• soap or alcohol wipes (if in first aid kit)
• plastic bag (for contaminated clothing or wipes)

Materials

• clean cloth or gauze
• extra drinking water (if feasible)
• over-the-counter antihistamine (if available)
• cooling gel (if in kit, e.g., aloe vera pack)

Step-by-step

• Stop hiking and move to a shaded spot to assess the area.
• Avoid scratching or rubbing the itchy skin.
• Rinse the affected skin with available clean water—use sparingly if supply is low.
• If you have soap or alcohol wipes, gently cleanse the rash area to remove plant oils.
• Pat dry with a clean cloth or gauze; do not rub.
• Place any used wipes or cloth into a plastic bag to avoid contaminating other items.
• If you have a cooling gel or aloe packet, apply a small amount to the rash.
• Take an over-the-counter antihistamine if you're not allergic and it’s in your kit.
• Roll up sleeves or pant legs to let the area breathe, but avoid sun exposure to the rash.
• Continue the hike with care, monitoring for increased redness, swelling, or blisters.

Troubleshooting

• If rash worsens, try to prevent further contact and avoid scratching.
• If swelling or blistering increases, keep area loosely covered and stay hydrated.
• If skin feels hot or develops pus, infection may be starting—seek help as soon as possible.

Common mistakes

• Scratching the rash, which may lead to infection.
• Using dirty water to rinse, increasing infection risk.
• Failing to isolate contaminated clothing or wipes, which can spread the oil.
• Not carefully reading medication labels before taking antihistamines.

When to call a pro

• If you have severe swelling, difficulty breathing, or widespread rash—seek emergency care as soon as you have service.
• If rash shows signs of infection (pus, increasing pain, spreading redness) after you leave the trail.
• If rash doesn’t improve within a few days or you’re unsure if the plant was poison ivy.

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