PSR ExpertPrimitive Survival Rating
Field first-aid bandage and cloth wrap laid on mossy wood

Skill pillar

Field First Aid

Injuries turn survivable trips into emergencies. First aid skill is calm triage: life threats first, then stabilise, then plan evacuation.

2 min read3 methods

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Scenario

Remote trail; partner with deep calf laceration; two hours to trailhead.

Best first move:

Direct pressure and packing beat clever herbal folklore. Then decide: can they walk with help, or do you need to signal for rescue?

Why it matters

The PSR calculator treats first aid as a gating skill—because a broken ankle or heat stroke ends self-rescue fast.

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Bleeding control

Direct pressure remains the core of field haemorrhage control across military and wilderness medicine.

At a glance

Energy investmentLow energyTechnique and materials matter more than strength.
ReliabilityHigh reliability
TimeImmediate action

Materials

  • Clean cloth
  • Improvised bandage
  • Tourniquet only if trained and indicated

Steps

  1. 1Expose the wound; apply firm direct pressure.
  2. 2Add dressing; do not peek repeatedly.
  3. 3Elevate if practical; treat for shock (warmth, calm, lying down).
  4. 4Use tourniquet only for life-threatening limb bleeds you cannot control otherwise—and note the time.

Common mistakes

  • Removing pressure to “check” too often
  • Tourniquet used casually for minor bleeds
  • Ignoring shock

Region fit

Best in: Temperate forest, Tropical jungle, Desert, Mountains, Snow & ice, Coast & swamp

  • Temperate forestGood fit
  • Tropical jungleGood fit
  • DesertGood fit
  • MountainsGood fit
  • Snow & iceGood fit
  • Coast & swampGood fit

Fit keyGood fitPoor fitAvoid

Other methods

Heat illness & hypothermia Medium energy · High reliability

Environmental injury management is older than modern medicine—shade, water, insulation and gradual rewarming.

Materials

  • Shade or insulation
  • Water
  • Dry layers
  • Sweet fluids if conscious

Steps

  1. Heat: stop activity, shade, cool skin, sip water if alert.
  2. Heat stroke signs (confusion, hot skin)—cool aggressively and evacuate.
  3. Cold: replace wet layers, insulate from ground, warm sweet drinks if conscious.
  4. Never rub frostbitten tissue with snow; protect and evacuate.

Energy investment

Medium energy. Prevention (pace, layers) costs less than rescue.

Region fit

Best in: Temperate forest, Tropical jungle, Desert, Mountains, Snow & ice, Coast & swamp

Common mistakes

  • Pushing through early heat cramps
  • Alcohol “to warm up”
  • Rewarming too fast after severe hypothermia without support
Stay or evacuate Medium energy · Medium reliability

Lost-person and wilderness medicine both emphasise decision points: self-rescue vs signalling for help.

Materials

  • Map/awareness
  • Signal tools
  • Honest assessment of injuries

Steps

  1. List life threats and mobility limits.
  2. Estimate time/distance to help vs risk of moving.
  3. If staying: improve shelter, water, signals.
  4. If moving: short stages, mark route, rest before exhaustion.

Energy investment

Medium energy. Bad marches destroy remaining reserves.

Region fit

Best in: Temperate forest, Tropical jungle, Desert, Mountains, Snow & ice, Coast & swamp

Common mistakes

  • Pride delaying a call for help
  • Night travel without need
  • Splitting the party carelessly
Rate

Skill ladder

Honest self-check using the same levels as the calculator.

  1. None

    No first-aid training; freezes or makes unsafe interventions.

  2. Basic

    Can manage cuts, pressure dressings and call for help.

  3. Proficient

    Wilderness first aid certified; handles environmental illness and evacuation planning.

  4. Expert

    Advanced wilderness medicine experience; leads team medical decisions under stress.

Related environments

Desert Mountains Snow & ice Tropical jungle

FAQ

Should I drink alcohol for cold?

No. It increases heat loss and impairs judgement.

When do I use a tourniquet?

Only for life-threatening limb bleeding you cannot control with pressure—and only if you know how. Note the time and seek emergency care.

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