Eli5: Why does dehydration make you bloated after air travel but thin if you refrain from drinking?

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This confuses me because apparently actors dehydrate to look thin before filming specific scenes.

In: Biology

2 Answers

Anonymous 0 Comments

Air pressure differences. Air cabins are pressurized for our comfort (and our survival) while flying, but that doesn’t completely neutralize it.

As the air pressure around you decreases, the gas pressure from the stuff inside you increases and expands.

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