Why does spicy food make our mouths feel like they’re burning, even though there’s no actual heat involved?

Question

Why does spicy food make our mouths feel like they’re burning, even though there’s no actual heat involved?

In: Chemistry

Answer 1

Capsaicin, the chemical that makes chilis hot, is a natural irritant to mammals, producing a burning sensation. It does this by binding to the same pain receptive nerves that sense heat or abrasive damage.