How and why does snot firm up in your nose, then turn into a goop again?

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How and why does snot firm up in your nose, then turn into a goop again?

In: Biology

Having a blocked nose isn’t fun. I’m trying to figure out why this happens and why you can have a runny nose soon after!

The snot doesn’t “firm up” and block you nose. In fact, a blocked nose has nothing whatsoever to do with snot!

A blocked nose is caused by swelling of the nasal tissue. The mucus membrane swells up and closes off your nasal passage. You have a runny nose after because, when you’re sick, your nose also produces a lot of snot. So when the swelling comes down a bit, the snot has an easier time running out.