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Why do my ears get red hot and burn a bit sometimes? Vasodilation: The outer ear or pinna has a rich blood supply and sometimes, the nerves that dilate (expand) those blood vessels (branches of the vagus nerve) become activated and the blood vessels dilate and give a red color to the pinna and a warm feeling.
Capsaicin stimulates nerve receptors in your mouth and essentially tricks your nervous system into thinking you're hot. Your body acts much like it does when you're outside in 90-degree heat. Your internal thermostat -- the hypothalamus in your brain -- sends out a signal to activate your sweat glands.Sweat reaches your skin and evaporates, taking the heat from your body with it. Foods that are hot temperature-wise can also make you sweat.Hot coffee, hot tea, and hot soups can sometimes make people sweat, even though their whole core body temperature isn't hot, says Dee Anna Glaser, MD, professor of dermatology at St. Louis University School of Medicine.apsaicin stimulates nerve receptors in your mouth and essentially tricks your nervous system into thinking you're hot. Your body acts much like it does when you're outside in 90-degree heat. Your internal thermostat -- the hypothalamus in your brain -- sends out a signal to activate your sweat glands.