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

I’m a diabetic and when my sugar is high I have a horrible urge to pee all the time. Right before I was first diagnosed, when my blood sugar was like 800, it was so bad that unless I stopped to pee every 15 minutes I would be in such horrible pain that I pulled over on the side of the road and just went there. Wasn’t amount/pressure related, it was the keytones, acid filtered out of my blood burning my bladder I guess

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