Why a shot can feel warm so quickly
The warmth is mostly a change in how heat is distributed—not a burst of new heat. After you swallow whiskey, alcohol begins entering your bloodstream, mainly through the stomach and small intestine. As it circulates, it can relax blood vessels near the skin’s surface. More warm blood reaches the face and skin, which can make you feel flushed or suddenly warm.
The sensation can arrive before alcohol has fully taken effect throughout the body. It is also influenced by the whiskey’s own brief burning sensation in the mouth and throat, where alcohol activates heat-sensitive nerve endings.
Skin warmth can mean greater heat loss
Blood flowing closer to the skin transfers heat to the surrounding air more readily. That can make your skin feel warm while your body is actually losing heat faster. In cold conditions, this is a poor trade: the surface may feel warmer even as the body’s core temperature falls.
Alcohol also affects the brain’s ability to regulate temperature and respond to cold. A person who has been drinking may be less likely to notice the danger or take steps to stay warm. Feeling warmer after a drink is not evidence that your body is warming up.
