Eli5: Why does swallowing/yawning help pop your ears?

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Open for any other additional tips as I’m currently all plugged from a 7 hour flight

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There is a tube that connects the middle ear to the back of the throat, above the palate. This tube is closed while at rest, but anything that causes a contraction of the soft palate muscles (including swallowing and yawning) will cause it to open, so air will flow in or out of the middle ear, equalising the pressure with that of the surrounding air. That’s when you hear or feel the pop.

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