eli5: Why does the serious urge to pee not correlate with the amount that comes out

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So sometimes when the urge to pee is really bad it’s bordering on painful, like after a long sleep or car drive, not that much comes out. But then other times when I’m just chilling at home and go for a pee with no urgency I pee like Seabiscuit. What gives? What causes you to need to pee so badly it hurts cuz it doesn’t seem like it’s a volume thing?

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Anonymous 0 Comments

In addition to other stuff said, the nerves that let you know when your bladder is full can become irritated and make you feel like you need to go

Alcohol is one such irritant, which leads to the whole “breaking the seal” phenomena. Any alcohol that passes through to be expelled with your urine will make it feel like your bladder is fuller than it is a lot quicker than it normally would be

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