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why do my ears pop when i go up in a plane? in the middle part of each ear, there is a sac of air behind the eardrum. the air there usually has the same air pressure as the air outside. when you take off in an airplane, the air pressure outside the ear goes down, but the pressure inside the ear stays the same as it was on the ground. the inside air starts to push against the eardrum, causing pain. from the sac of air in each ear leads a tube called the eustachian tube, which connects to the nasal passages and outside into the environment. when we swallow or yawn, the tubes open up allowing the pressure in the ear to become more like the pressure outside the ear. this causes the popping sound. the same thing happens when your plane goes to land.

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