First Aid & Medical: The Wilderness First Aid Kit and the Skills Behind It

What "First Aid & Medical" Covers Here

This category deals with care given in the window before professional help arrives — and specifically with how that window stretches.

In a city, an ambulance may reach you in minutes. Your job is to keep someone alive and uninjured further until it does. In the backcountry, or after a storm has closed the roads, the same injury becomes a different problem: you may be carrying, splinting, rewarming and wound-managing for hours. A common working definition of wilderness medicine is care delivered when definitive treatment is more than one hour away, or when evacuation is uncertain. That single distinction drives almost every decision downstream — whether you clean a wound thoroughly or just cover it, whether a sprained ankle is an inconvenience or an evacuation, whether you stop and camp or keep moving.

What you will find in this section:

• Kit design — what goes in a wilderness first aid kit, what earns its weight, and what is filler.
• Skills and standards — bleeding control, CPR, patient assessment, splinting, wound management, and the environmental injuries that cause most backcountry problems.
• Training paths — which courses teach hands-on skills, and what each level does and does not qualify you to do.
• Household medical preparedness — prescription buffers, refrigerated medication during outages, allergy plans, and the medical side of a 72-hour kit.

What you will not find: diagnosis, prescribing, or anything resembling a substitute for training and a licensed clinician. We write to help you decide what to carry and what to practise. Our disclaimer sets out the limits of that plainly, and they are real limits, not legal decoration.

The Numbers Worth Memorising

Most of first aid is judgement. A small number of figures are not, and those are the ones to hold in your head, because you will not be reading a card when you need them. Every figure below matches current mainstream published guidance — check each against the source before you rely on it.

• Scene first. You are no use as a second patient. Moving water, rockfall, traffic, downed lines, carbon monoxide: assess before you approach.
• Order of attack. Life-threatening bleeding, then airway, then breathing, then circulation, then temperature. A catastrophic bleed kills faster than anything else you can fix with your hands.
• Adult CPR: compressions at 100–120 per minute, at least 2 inches (5 cm) deep and not more than about 2.4 inches (6 cm), full recoil between compressions, interruptions kept as short as possible. If you are untrained or unwilling to give breaths, compression-only CPR is the recommended alternative. See the American Red Cross for current technique.
• Tourniquet: placed 2–3 inches (5–8 cm) above the wound, never over a joint, tightened until the bleeding stops rather than until it merely slows, and the time of application written down. It will hurt. That is expected.
• Burns: cool with cool — not ice-cold — running water for 10 to 20 minutes, remove rings and watches early before swelling, then cover with a clean non-stick dressing. No ice, no butter, no ointment on a fresh serious burn.
• Heat illness: heat stroke means a core temperature around 104°F (40°C) or higher with altered mental status. Confusion plus hot skin is the signal to start aggressive cooling immediately and arrange transport — not to wait for a thermometer. CDC guidance is the reference.
• Hypothermia: mild hypothermia begins below a core temperature of about 95°F (35°C). Shivering that stops in someone still cold is a deterioration, not an improvement. Insulate from the ground, replace wet layers, add a vapour barrier, and handle the patient gently.
• Carbon monoxide: run generators and fuel-burning engines at least 20 feet (6 m) from any building, away from doors, windows and vents. CO poisoning is a medical emergency you prevent rather than treat. Ready.gov covers it.

If you are asking yourself whether a situation warrants evacuation, that question is usually your answer. Deciding early, in daylight, with the patient still walking, is a materially different situation from deciding at 2 a.m. with someone who can no longer stand.

Build the Kit Around Injuries, Not Item Counts

Piece count is a marketing number. A kit advertised as "300 pieces" is typically 200 adhesive bandages in four sizes and one pair of gloves. Build instead from the injuries that actually occur, weighted by how often they occur.

In practice, the overwhelming majority of what a backcountry kit treats is skin and feet: blisters, abrasions, small lacerations, splinters, sunburn, minor burns from stoves. Next comes musculoskeletal — rolled ankles, strained knees, the fall that ends a trip. Then medical — allergic reactions, gastrointestinal illness, headaches, dental pain, and whatever chronic condition somebody in your group manages every day. Catastrophic trauma is rare, and it is also the one thing that will kill someone before help arrives, which is why one tourniquet and one pressure dressing earn their place despite the odds.

That shape suggests a kit with:

• Blister and wound care as the bulk of the volume — several dressing sizes, tape that sticks to sweaty skin, a way to irrigate.
• Irrigation you will actually use. Cleaning a contaminated wound properly in the field means a generous volume of clean drinking water under some pressure — a full bottle's worth, not a splash — because that wound may not see a clinician for a day or more.
• One trauma layer, not five. A tourniquet you have trained with, a pressure dressing, gloves.
• Medications as the smallest and most useful part of the kit — an antihistamine, an analgesic, an anti-diarrhoeal, plus every prescription your group depends on, in labelled containers. If anyone carries an epinephrine auto-injector, everyone should know where it is and how it is used.
• Gloves in multiples. One pair covers one patient, badly. Nitrile is light enough that carrying several pairs costs nothing.
• Tools that do more than one job — trauma shears, tweezers, a small irrigation syringe or a bottle cap that produces a jet.

As a design target rather than a rule: a personal day-hike kit that comes in around 0.5 to 1 lb (0.25 to 0.5 kg) and a group multi-day kit around 1.5 to 3 lb (0.7 to 1.4 kg) are weights people keep carrying. Kits heavier than that get left in the car, which drops their effectiveness to zero. The full build, item by item, is in our wilderness first aid kit guide.

The Order to Learn This In

Skills beat stockpiles, and they beat them by a wide margin here. A person with training and a bandana outperforms an untrained person with a large kit. This is the sequence we would work through, and each step is useful on its own if you stop there.

1. Take a hands-on CPR and AED class. A few hours, widely available, and the only way to learn compression depth is to compress something. Reading about it does not transfer. 2. Learn bleeding control. Direct pressure, packing, and tourniquet application. Buy two tourniquets: one to train with until it is worn out, one sealed and carried. A tourniquet you have never tightened is an unknown device. 3. Take a wilderness first aid course. These typically run about two days and roughly 16 hours of instruction, much of it scenario-based outdoors. The value is less the protocols than the decision-making: when to evacuate, how to move someone, how to keep a patient warm for six hours. 4. Build your kit and learn every item in it. Assemble it yourself, or buy a pre-made kit and then open it, inventory it, and remove what you cannot name. 5. Learn a patient assessment system and write it down. A structured head-to-toe check plus a written SOAP note with timed vital signs turns "he seemed worse" into information a rescue team can act on. 6. Plan the evacuation before you need it. Distance to the trailhead, where cell coverage actually exists, whether you carry a satellite messenger or personal locator beacon, who is called and what you will say. 7. Sort out the household side. A rolling buffer of prescription medication arranged with your own pharmacist, a written list of everyone's medications and doses, a plan for refrigerated medication during a long outage, and allergy plans where they apply. 8. Requalify and re-audit on a schedule. Certifications lapse for a reason, and skills decay faster than the certificate does.

If you want this sequenced alongside water, food, power and the rest, Start Here puts the whole thing in order.

The Mistakes We See Most

These are failure modes, not moral failings. Nearly everyone makes several of them on the way to a kit that works.

• Buying the kit instead of the training. The kit is the cheap half. It is also the half that does nothing on its own.
• Never opening the packaging. The first time you unwrap a tourniquet should not be in the dark with someone bleeding. Buy a trainer, destroy it, then carry the sealed one.
• Carrying one pair of gloves. Or none, because they were used on a blister in March.
• Treating the wound and ignoring the evacuation. The bandage takes four minutes. The 3 mile (5 km) carry-out with a patient who cannot bear weight takes the rest of the day, and it is the part nobody planned.
• Ignoring temperature. Injured people get cold fast, even in mild weather, because they stop moving and often end up lying on the ground. Ground insulation is not an afterthought; it is treatment.
• Letting the kit cook. Kits stored in a vehicle go through repeated heat cycles that degrade adhesives, dry out alcohol wipes and shorten medication life. Check anything that has lived in a car through a summer.
• Expired and ambiguous medication. Loose pills in a plastic bag are unidentifiable under stress and legally awkward. Keep labels.
• Skipping the boring skills. Foot care, hydration, sun protection and pacing prevent more incidents than any trauma item will ever treat.
• Assuming coverage. Plenty of terrain has none, and a dead phone has less.
• Stockpiling prescriptions without a clinician. Antibiotics chosen by internet search, at wrong doses, for a wrongly guessed infection, is a way to make a treatable problem worse. The real route is a conversation with your own prescriber about a travel or emergency supply.

Drills With Pass/Fail Standards

You cannot tell whether you can do something until you set a standard and fail it a few times. These are the checks we use; each has a condition and a clear pass line, and each is meant to be repeated until it is boring.

• Blind inventory. Empty your kit on a table. Name every item and what it is for, in under 2 minutes. Pass: every item named. Fail: any item you cannot explain — learn it or remove it. There is no third option.
• Tourniquet, self-application. With a training tourniquet, apply it to your own upper thigh one-handed in under 60 seconds, then repeat with the other hand. Pass: windlass locked, secured, time noted, and you could not have tightened it further. Fail: anything you would describe as "close enough".
• Two minutes of CPR. On a manikin or a training device, hold 100–120 compressions per minute at full depth for 2 continuous minutes. Pass: rate and depth hold to the end. Most people learn here how quickly they tire, which is exactly the point — it tells you how urgently you need a second rescuer.
• Gloves on wet hands. Wet your hands, then glove up in under 30 seconds without tearing a glove. Fail: torn glove, or a second pair used. This is the least glamorous drill and one of the most predictive.
• Wound irrigation. Irrigate a mock wound with roughly one litre (about 1 quart) of clean drinking water under pressure, then dress it. Pass: the irrigation source never touched the wound, the dressing went on clean, and you know how much water that consumed — because that volume comes out of your drinking supply.
• Improvised splint. Splint a forearm in under 10 minutes using only what you are carrying. Pass: joints above and below immobilised, circulation checked before and after, and you would genuinely walk 3 miles (5 km) wearing it.
• SOAP note from memory. Write a patient report — subjective, objective, assessment, plan — with two timed sets of vital signs, in under 5 minutes. Pass: someone else could read it and know what changed and when.
• The evacuation call. Out loud, state your location in coordinates, the patient's problem, the number of people with you, and what you need. Pass: under 60 seconds, and you did not have to look up your own coordinates twice.
• Six-month audit. Every six months, check expiry dates, adhesive integrity, battery levels and whether anything was used and not replaced. Fail: one expired item means the whole kit gets a full pass-through, not a spot fix.

How We Evaluate Medical Gear

We are direct about the boundary here, because it matters more in this category than any other.

We do not test clinical outcomes. We do not run trials on dressings, compare wound infection rates, or generate our own resuscitation data. For anything safety-critical — CPR rates and depths, trauma protocols, treatment thresholds — we follow and link to published guidance from the American Red Cross, CDC Emergency Preparedness, Ready.gov and FEMA, and we date the version we read. If those sources change, our pages change.

What we do test is the physical product, because that is where marketing claims and field reality diverge and where honest measurement is possible:

• Whether sealed packaging survives submersion, compression in a pack and repeated freeze-thaw cycles.
• Whether tape and dressing adhesive still bonds after a season of heat cycling in a vehicle.
• Whether a tourniquet windlass, strap and clip hold under load and repeated application, and whether the buckle can be operated in gloves or with cold hands.
• Whether trauma shears cut the materials people actually wear, including layered synthetics and a boot upper.
• Whether gloves tear when pulled onto wet hands.
• Measured weight and packed volume against the manufacturer's stated figures.
• Whether the instructions inside the kit are legible, complete and usable by someone who did not pack it.
• How long it takes to find a specific item in the dark.

Every result is published with its conditions — temperature, duration, sample size, how the item was used — and the failures are published alongside the successes. Where the evidence is thin, or where the honest answer is a range rather than a number, we say so instead of manufacturing precision. The full protocol is in How We Test, the standards behind it in Editorial Standards, and commercial relationships in our affiliate disclosure.

What We Will Not Recommend

A category page should be as clear about its exclusions as its inclusions. These are things you will not see us endorse, with the reason attached.

• Snakebite extractors, suction devices, cutting or constriction bands. Mainstream guidance does not support them, and some of these interventions cause additional harm. For a venomous bite in the United States, the guidance is to keep the person calm, remove rings and tight clothing, keep the limb roughly at heart level, and get to a hospital.
• Suture kits for untrained use. Field wounds are contaminated. Closing one traps the contamination inside. Thorough irrigation and an open or loosely approximated dressing is the better outcome in almost every scenario a layperson will meet.
• Unverified tourniquets from marketplace sellers. Counterfeits of well-known trauma tourniquets circulate widely and fail under load. Buy from a supplier who can tell you where the unit came from, and train with a second one so you learn what a properly tightened device feels like.
• Self-directed antibiotic stockpiles and veterinary or aquarium antibiotics. Wrong drug, wrong dose, wrong diagnosis, and no way to monitor the result. If you have a genuine need for an emergency supply — remote travel, an expedition, a chronic condition — that is a conversation with your own prescriber.
• Kits sold on piece count. The number describes adhesive bandages, not capability.
• Anything sold through fear. No countdowns, no implied collapse, no bundle that only makes sense if you believe help is never coming. If a product needs a scenario that dramatic to justify its price, the product is the problem.
• Numbers we cannot source. We will not publish a treatment figure, a shelf life or a dosage we cannot trace to published guidance or to a documented test. Where we do not know, the guide will say we do not know.

Where First Aid Meets the Rest of Your Preparedness

Medical problems in an emergency are rarely purely medical. They are usually the consequence of something else that went wrong first, which is why this category connects to most of the others on the site.

• Water. Dehydration precedes a large share of backcountry incidents, and waterborne illness is one of the most common ways a trip or a post-disaster week goes bad. Wound irrigation also competes with drinking supply. Start with how much water to store per person and the EPA's guidance on emergency disinfection.
• Food safety. After an extended outage, the medical risk shifts from injury to foodborne illness. FoodSafety.gov covers the spoilage windows, and our 30-day pantry guide covers keeping the supply itself sound.
• Warmth. Hypothermia is a first aid problem solved mostly with shelter, dry insulation and fire. Starting a fire in wet conditions is a medical skill as much as a bushcraft one.
• Power. Refrigerated medication, powered medical equipment and oxygen concentrators all depend on electricity, and the generator that keeps them running is itself a carbon monoxide hazard if placed badly. See backup power for a home outage.
• The base kit. The medical layer sits inside a broader grab-and-go setup — see the 72-hour emergency kit.
• Weather. Most of what you will treat is downstream of conditions you could have seen coming. The National Weather Service is the primary source, not a forecast app's summary.

Browse everything we have published in all guides, or work through the recommended order in Start Here.