The “feeling” hot in a cold survival situation is actually very bad for you and places you at much greater risk of dying of cold.
When you feel cold your body constricts blood flow to the surface and extremities to reduce the rate of heat loss. Your skin, fingers, ears, etc are all cold because your body is keeping your blood inside insulation layers (behind surface fat) to keep your essential organs warm.
Things that make you “feel” warm – spices, alcohol, etc – reverse this and send blood to your skin and extremities, outside your insulation layers, where it will lose heat very quickly so your body has less ability to maintain your core temperature.
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