Why We Shiver When Peeing



Fess up: you’ve always wondered why you sometimes shiver when peeing. Well, thanks to science, this oft-silently wondered but seldom asked aloud mystery is now solved:

The [phenomenon of pee shivers] is an example of the human body’s autonomic nervous system (ANS) at work.

We are not conscious of the ANS. It runs on automatic, hence its name, "autonomic", which literally means "self controlling, working independently". The urination reflex is relayed through the ANS. The reflex is directly related in strength to the amount of stretch of the bladder. Thus, the degree of shivering is generally related to how full the bladder is at the time of urination.

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Posted on February 4, 2008 at 7:00 am by Alex
Category: Medicine

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16 comments to "Why We Shiver When Peeing"

  • el_inquilino
    February 4th, 2008 at 8:26 am

    is more than just the degree of stees of the gall blader;

    and by the way the ANS can be controlled, with a little work and time you can achieve amasing things :)

  • DoorFrame
    February 4th, 2008 at 9:11 am

    This is a thing? I don’t think I have it.

  • Tempscire
    February 4th, 2008 at 9:14 am

    …people shiver when they pee?

  • Eni
    February 4th, 2008 at 9:15 am

    I have never noticed this either..

  • Alice
    February 4th, 2008 at 9:48 am

    I’ve heard of this. However, I was under the impression that it was a male only phenomenon.

  • ted
    February 4th, 2008 at 9:58 am

    Never heard of it.

  • SW
    February 4th, 2008 at 10:31 am

    omg my gf and i were just wondering about this! it seems to happen most when we’ve tried to ‘hold it’ a long time. it’s just a single shudder. maybe it’s a girl thing?

  • Dave
    February 4th, 2008 at 11:23 am

    I’ve always subscribed to the explanation Steve Martin talked about in his standup routine; it’s just nature’s way of shaking off.

  • kdub
    February 4th, 2008 at 11:42 am

    My ex used to always talk about “piss shivers” and I never knew what he was talking about… and never heard it from any other source until today. So he was crazy, just not as crazy as I thought!

  • ferrocyanide
    February 4th, 2008 at 12:38 pm

    Can’t say I’ve ever experienced this…

  • Mark
    February 4th, 2008 at 6:18 pm

    Never had it myself. Wonder what percentage of people have it.

  • DB
    February 4th, 2008 at 8:59 pm

    Wow, I have never even heard of this.

  • nopers
    February 4th, 2008 at 10:16 pm

    Never heard of it, never had it.

    Sounds made up, like Fan Death.

  • linuxgrl
    February 5th, 2008 at 1:27 am

    My husband and I have experienced this. We call it the “Piss Willies” Is ANS also what causes goose bumps after a sneeze? FYI: I hear if you sneeze with your eyes open they will come flying out. HA!! Not really but sounded cool. Piss willies RULE!! Have sex then pee, you’ll get the piss willies. hhhhhhburrrr (shake)

  • thegnu
    February 5th, 2008 at 10:06 am

    It only really happens to most people if they hold it a really really long time. It’s exciting, though.

  • s1mplex
    February 5th, 2008 at 7:24 pm

    From the article:

    …[T]here is a slight blood pressure rise and a momentary flushing or euphoria shortly after relaxing the urethral sphincter. Some find this feeling pleasurable.

    Indeed. From personal experience, I can tell you that this effect (post-micturation convulsion) can be exacerbated under certain physiological conditions.

    After taking a medication for several months that caused polyuria (excessive urination) as a side effect, I found that going pee-pee had all of a sudden become a nearly orgasmic experience!

    Of course, the polyuria itself was pretty annoying, so an adjustment in dosage put an end to all the, um, fun.


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