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Mystery #3Tier 2-3blood flow / temperature / balance

Why do you suddenly need the toilet more when you get cold?

Step out into the freezing cold, or jump into a chilly swimming pool, and before long your body is nagging you to find a toilet, even though you have not had an extra drink. Somehow being cold makes more wee. How does a shiver reach all the way to your bladder?

Feathery frost crystals spread across a cold window pane
Photo: Jojoo64 · CC BY-SA 4.0 · via Wikimedia Commons

Your guess

Why do you think being cold sends you running to the loo?

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