So what really happens to ears when we fly? It all comes down to air pressure. Normally the air pressure inside the inner ear and the air pressure outside are essentially the same, or at least not different enough to cause any trouble. Even if you were to hike to the top of a tall mountain, the slow speed of your ascent would allow time for the pressure to equalize along the way. A problem only occurs when the change in altitude is so rapid, like it is in air travel, that the pressure inside the inner ear and the air pressure outside don’t have time to equalize.
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