Eli5: How/ Why does a full bladder wake you up or prevent you from falling asleep?
In: 3
You should never have a full bladder. A full bladder would mean that it could not contain any more liquid and might burst.
Your body has you empty your bladder before it gets full to prevent any problems with your bladder. So your body chooses “an appropriate” time for you to go to the bathroom. When it feels the time is appropriate, it makes you feel like you have to pee and so you pee.
An appropriate time to go to the bathroom is when you are bored or doing nothing in particular. Like when you are resting. That means there is no danger and you can safely go to the bathroom.
So when you wake up in the middle of the night your body decides it would be a good time to pee and makes you feel like you have to pee.
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