When your body temperature goes below 35.0 °C (95.0 °F) we can start talking about Hypothermia. Symptoms depend on the temperature, and there are usually two kind of hypothermia definition. In mild hypothermia there is shivering and mental confusion. When shivering stops and your body functions start to be decompensated, we start talking about severe hypothermia: there may be paradoxical undressing, in which a person removes his or her clothing, as well as an increased risk of cardiac arrest.
You could watch an interesting explication about hypothermia from the Wilderness Medicine Association, who talk about treatment of this kind of illness. We could say also that Hypothermia occur from two different condition that decreases heat production or increases heat loss. Alcohol intoxication, low blood sugar, anorexia, adanced age increase the risks.
The treatment of mild hypothermia involves “all the things your mom suggest you to do”. Warm drinks, warm clothing, physical activity, stay near the campfire. In those with moderate hypothermia, heating blankets and warmed intravenous fluids are recommended.
In severe hypothermia, things changes suddendly. People with severe hypothermia should be moved gently. The internal organs did not work as usual and they start to be not compensated. In this cases, extracorporeal membrane oxygenation (ECMO) or cardiopulmonary bypass may be useful. In those without a pulse, cardiopulmonary resuscitation (CPR) is indicated along with the above measures. Rewarming is typically continued until a person’s temperature is greater than 32 °C (90 °F).