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Wilderness First Aid Basics
8 min read
Help can be hours away in the backcountry, so the first responder is usually you. These are the fundamentals that save lives — but reading them is not the same as training. Take a Wilderness First Aid (WFA) course before you rely on any of it, and when someone is seriously hurt, call 911 or trigger your satellite SOS as early as you can.
Size up the scene first
Before you touch anyone, make sure you won't become the second patient — rockfall, water, weather, unstable ground.
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Check the area is safe, then check the person: are they awake and talking?
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Airway, Breathing, Circulation. If they're speaking clearly, all three are working.
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Look for and stop major bleeding right away — it kills faster than almost anything else.
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Note the time. It matters for tourniquets, evacuation decisions, and handing off to rescuers.
Serious bleeding
Firm, direct pressure on the wound is the first and best move — press hard, don't peek, and hold it.
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If blood soaks through, add more gauze on top and keep pressing; don't remove the first layer.
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For a deep wound that won't stop, pack it tightly with gauze or clean cloth and keep pressure on.
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Life-threatening limb bleeding that pressure won't control: apply a tourniquet 2–3 inches above the wound, tighten until bleeding stops, and write down the time. It will hurt — that's expected.
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Never loosen a tourniquet once it's on; that's a hospital decision.
Hypothermia
Cold, wet, and wind — not just winter — is the classic setup. The 'umbles' are your warning: stumbles, mumbles, fumbles, grumbles.
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Early: intense shivering, clumsy hands, slurred or grumpy talk.
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Get them out of wind and rain, swap wet layers for dry, and insulate them from the ground (a pad matters more than a blanket).
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If they're alert enough to swallow, warm sweet drinks help fuel the furnace.
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Severe (shivering stops, very confused or drowsy): handle gently, wrap them in a full insulation 'burrito,' and evacuate — rough handling can be dangerous.
Heat illness
Heat exhaustion is miserable; heat stroke is a true emergency because the brain is cooking.
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Heat exhaustion: heavy sweat, weakness, nausea, headache. Move to shade, cool down, sip water with electrolytes, rest.
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Heat stroke: confusion, stumbling, or passing out — often with hot skin. This is life-threatening.
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Cool aggressively: shade, remove excess clothing, douse with water, fan, put cool packs at neck, armpits, and groin. Call for help.
Sprains, strains, and possible fractures
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Rest, and support the injury. For swelling, cool it if you can and elevate.
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If you must splint, pad well and immobilize the joints above and below the injury — splint it in the position you found it.
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Check that fingers or toes past the injury stay warm, pink, and can feel touch. If they go cold or numb, loosen the splint.
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An obvious deformity, or bone through skin, is an evacuation.
Blisters and hot spots
The best blister care is stopping one before it forms.
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The moment a spot feels hot or raw, stop and cover it with tape, moleskin, or a blister patch.
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If a blister has formed and isn't likely to pop, leave it intact — the skin is a bandage.
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If it must be drained, clean it, prick the edge with a sterilized needle, press the fluid out, keep the skin on, and cover it.
When to stop and get help
Some signs mean 'end the trip and evacuate now,' phone or satellite messenger first if you have signal.
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Any change in how alert or clear-headed someone is.
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Chest pain or shortness of breath, a stroke's face/arm/speech signs, or a seizure.
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Bleeding you can't control, a bad head or spine injury, or a deformed/open fracture.
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Worsening despite your care, or an injury they simply can't walk out on.
A small kit covers most of this
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Gauze and a pressure bandage, a roll of athletic/leukotape, and blister patches.
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Adhesive bandages, wound-cleaning wipes, tweezers, and any personal meds.
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A commercial tourniquet if you carry sharp tools or travel far from help.
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An emergency bivy or blanket, and a way to call out (phone in a dry bag, or a satellite messenger).
This is general information, not medical advice, and no article replaces hands-on training. Take a certified Wilderness First Aid course, and when in doubt, call for professional help.