# Ear pressure in car

**URL:** <https://boards.straightdope.com/t/ear-pressure-in-car/662238>\
**Category:** Factual Questions\
**Created:** [June 30, 2013, 2:29am UTC](https://boards.straightdope.com/t/ear-pressure-in-car/662238 "2013-06-30T02:29:17Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![nion](https://avatars.discourse-cdn.com/v4/letter/n/c5a1d2/32.png) [@nion](https://boards.straightdope.com/u/nion)\
**Post date:** [June 30, 2013, 6:25am UTC](https://boards.straightdope.com/t/ear-pressure-in-car/662238/2 "2013-06-30T06:25:23Z")

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Just a guess, but air pressure could be building from air being forced into the car, but not having a ready exit. Both windows open would allow both entry and exit for the air, lowering the effective air pressure.

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