https://troopleader.scouting.org/program-feature-first-aid/
American Red Cross/BSA - Wilderness First Aid (Original Download)
https://www.scouting.org/health-and-safety/safety-moments/
Feeling cold, shivering uncontrollably
Cool or cold skin on the abdomen, chest, or back
Presence of the “umbles”
Stumbles: loss of control over movement
Mumbles: slurred or incoherent speech
Fumbles: poor coordination or reaction time
Grumbles: change in behavior or attitude
Fatigue
Stiff muscles
No shivering
Skin that feels ice-cold and may appear bluish
Confusion, agitation, memory loss
Slow, weak pulse
Slow, shallow breathing
Loss of consciousness
Get the victim out of the cold.
Remove wet clothing
wrap them up in warm, dry clothes.
Add additional layers such as a sleeping bag, blankets, or some form of plastic to hold in body heat.
If the victim is conscious and can swallow, offer them warm liquids to drink. Do not give alcoholic drinks.
Handle them gently. Excessive movements or rough handling can lead to cardiac arrest.
Apply warm, dry compresses to the neck, chest, and groin areas.
Do not apply heat to the arms or legs, because this speeds cold blood back to the heart, lungs, and brain, causing the core temperature to drop even lower; this can be fatal.
Do not apply direct heat as with hot water bottles, a heating pad, or a heating lamp. This extreme heat can cause skin damage, an irregular heart rhythm, or even cardiac arrest.
If a person with severe hypothermia is unconscious, doesn't have a pulse, and isn't breathing perform CPR. CPR should continue during rewarming. Sometimes, people experiencing hypothermia can be successfully resuscitated.
Get emergency care/call 911.
https://www.scouting.org/health-and-safety/safety-moments/hypothermia/
Identification:
Wounds will look like a central white or gray area surrounded by pink skin
Followed by mild swelling.
Treatment:
Immediately remove someone with these symptoms from the cold and change their clothing if needed.
Soak the affected area in warm water or use body heat to provide warmth.
Protect exposed skin.
Get into a warm environment.
Identification:
Signs are pink and moist tissue.
Clear blisters, usually surrounded by redness and swelling.
Treatment:
Be sure not to rub the affected area because friction may cause more damage to your skin.
Take care not to damage the blisters because they are protecting the tissue underneath.
Rewarming must begin immediately, followed by professional medical care.
Do not allow the skin to refreeze, this will cause more damage.
Eating food and drinking warm liquids.
Identification:
Skin feels frozen and hard
Skin appears red, purple, or even black.
If left untreated, the development of thick, black, dead tissue over one to two weeks will follow.
Treatment:
Rewarming in this condition will induce critical pain.
Get professional treatment
It is more important to get professional help than rewarming. If it warms do everything possible to prevent refreezing.
Source
https://www.scouting.org/health-and-safety/safety-moments/frostbite/