eli5: why when your ears get cold and blood flow is slower you can’t feel them but can still hear

Question

eli5: why when your ears get cold and blood flow is slower you can’t feel them but can still hear

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Answer 1

The sensation of feeling your ears is due to the nerves in your skin sending signals to your brain, which interpret the signals as touch. When your ears get cold, the blood vessels in the skin constrict, reducing the amount of blood flow to the area. This reduces the amount of signals sent to the brain, so you can’t feel your ears, even though you can still hear.