We’ve all had the feeling. You’re embarrassed, and then there it is: a warm flush creeping up your neck and across your cheeks. The more you think about it, the hotter and redder you get. If someone asks: “Are you blushing?” it only makes you blush more.

So why do we do it? When we’re already self-conscious, this involuntary response can feel like an added punishment. But evolutionary science suggests blushing may actually have social advantages. Let’s take a look.

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