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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32 Answers

Anonymous 0 Comments

Also, why does it become nearly impossible to hold it while I’m unzipping sometimes. Like after a long car ride – fine walking to the toilet, almost blow it while I’m getting my equipment out. Why?!?

Anonymous 0 Comments

It doesn’t….?

That’s *exactly* how it works for me.

Anonymous 0 Comments

This sounds like some early stage BPH if you ask me. Sounds like you have urinary retention and the sheer volume of pee in the bladder when you hold it for a long time causes pressure on the enlarged prostate and in response it is contracting (like a muscle) and squeezing your urethra trapping all the urine inside the bladder, which is why you only get a lil sprinkle after holding for a long time (this prostate contraction normally occurs during sex and is why men don’t pee when we ejaculate, the prostate shuts the bladder off from the urethra, but it shouldn’t be shutting it off while peeing unless it is oversized). This is also probably why you pee a river amount when your just chilling and randomly go toilet, because your prostate is relaxed and let’s all of the urine saved up from the last unsuccessful toilet break finally come out.

Probs should ask if you’re a bloke coz this wouldn’t apply if you were a female. Either way urinary retention and urgency are never a good combination and it is not normal (despite all these people talking about “nerve irritation”) and you should probs go see your PCP and they might refer u to a urologist. Goodluck OP

Anonymous 0 Comments

It sounds like you could have some crud shoved up there that is blocking the flow preventing all your urine from coming out. Have you been sounding yourself recently with wooden objects or weak alloys?

Anonymous 0 Comments

Excessive urge to urinate is a symptom of diabetes. How’s your fasting blood sugar?

Anonymous 0 Comments

I often get the premature “have to pee so bad” urge when I’m gassy which means i have my inflated intestines pressing against my bladder and taking up space that my bladder could be expanding into…

Anonymous 0 Comments

various chemicals change the pH and the consistency of the pee which aggrivates the nerves that help determine how much volume you are holding (or maybe they know something we don’t) that trigger you to pee.
Higher pH, more likely to pee, such as coffee, alcohol, tea etc.
I dunno this is all from my urologist. Im a veteran of bladder cancer

Anonymous 0 Comments

No one has mentioned level of current hydration. When you are dehydrated your bladder likes or feels the need to get rid of the highly concentrated urine. When you are more hydrated the bladder doesn’t notice the urine as much because it is diluted hence not really feeling like you have to go when you have a huge bladder full of clearer liquid. My wife explains this better. Most of us are chronicly dehydrated.

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.

Anonymous 0 Comments

If you are also constipated this is much more likely to happen because there’s not as much room for your bladder/urine in that area and it will need to be emptied more frequently.