eli5 why do we wake up from deep sleep to pee but don’t actually wet the bed ?
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I had surgery a couple months ago that required me to lay flat on my back for hours. I drank a lot of water while laying there, and had been given a lot of fluids during the surgery itself. An hour or two into laying there, I really had to pee. Like, I was in pain I had to pee so bad.
They’d put this little.contraption between my legs that would suction up my pee, I just had to let go. It took 20 minutes for me to get my body to let loose, despite the extreme discomfort and even pain I was in over how badly I needed to pee. My body refused to let loose while laying in bed, it just seemed to know that was not the correct place to pee.
I peed two more times before I was allowed to move around, and they went much smoother. My body realized it was ok to piss the bed. But man, that first pee was such a struggle.
You guys don’t wet the bed?
On a weirder note: whenever I need to pee irl while dreaming my dream refuses to accommodate me. I’ll find a bathroom and every stall and toilet will be covered in shit and piss so I won’t have anywhere to go. This has happened more than once. At least I won’t pee in my sleep ig.
I used to not wake up, because I had weak bladder muscles and couldn’t hold it through a rem cycle. We got this underwear set that sets off an alarm when it senses you wetting the bed (this shit sucked, it was so loud), and from then on I’d groggily wake up in a panic right before I was about to wet the bed, because I knew the alarm was about to scare the piss outta me. Eventually I was able to strengthen those muscles and fix the problem, but yeah you’ve gotta have a trauma response to wake up from deep sleep just to go pee, usually your body holds it, like others have mentioned
There are nerves inside your bladder that can sense when it’s starting to stretch. As it stretches, it sends signals to your brain telling you that you have to pee. At first, there’s not much pee in there so the signals are really weak. You barely even notice them when you’re awake. But then more and more urine fills your bladder and the signal gets stronger and stronger, until finally it’s so strong, it literally wakes you up. And you feel like you have to pee a gallon. The previous signals weren’t strong enough to wake you.
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