when you really have to pee, why does it feel like you have to go more while you’re standing as opposed to sitting down?
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Space basically. The need to pee is measured by pressure in the blatter. The fuller, how higher. When you’re sitting, there is less distance from your hip to your chest. When standing your abdomen is used in its entire length. There is less space for the full blatter to go. So there’ll be a higher pressure because the surrounding area is up against it. When your blatter is full; and you get up to stand, it’s basically like thr trash compactor from Star Wars
Long story short, stress.
When you fill your bladder up with urine, the bladder expands, and the stress felt by your bladder muscle translates to the urgency to pee.
When you are sitting down, the chair actually provides pressure and force upwards, relieving SOME pressure.
But when you are standing, the only thing keeping the pee in is your bladder muscle and the bladder neck. and as you move, the liquid sloshes around, providing more stress to the muscle group, which is why walking, standing, and sitting will all provide a different level of retention.
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