eli5/ why do we have such a tolerance for needing to pee when asleep?

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if i am awake and drinking like I usually do i’ll pee extremely frequently and the accumulation of that fluid is never apparent when looking at me but when i wake up i have so much stuff to pee out that accumulated at the bladder that i look like I’ve just found out i’m pregnant why is it that if i tried to hold it in when i was awake i’d be in a great deal of discomfort but i don’t wake up in discomfort but am visibly swollen with fluid

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Anonymous 0 Comments

Melatonin is part of the answer here. It’s sends a signal throughout the body that it’s dark out and it is time to rest. This effect is systemic, including the digestive tract, which is why most people don’t have regular nighttime bowel movements.

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