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 my experience, the darker the pee, the worse the pain. Dark pee is mixed with lots of salts, etc. that irritate the bladder. Now that I’ve committed to carrying a water bottle and finishing it 2x/day (for a total of 8 cups), I’m lots more comfortable, and my ‘night time pee urges’ aren’t so bad.

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