Why do teeth hurt?
from Live Science
That gnawing, throbbing pain, the sharp jolt from a cup of hot coffee — almost everyone alive today has experienced the intense pain of a toothache. But why exactly do we get toothaches? In short, it is because, unlike hair or nails, teeth are made up of living tissue, said Christine Wall, an evolutionary anthropologist at Duke University who studies the evolution of teeth. Pain is the brain's way of knowing something has gone wrong in the tissue, she said.
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