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Uploaded:2018-01-16
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Jumping into a refreshingly cold body of water on a hot summer day can feel wonderful, except for your nose. Why does it hurt so much when you get water up your nose?

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Sources:

https://www.statnews.com/2016/04/21/boddities-hurt-get-water-nose/
https://www.npr.org/sections/health-shots/2011/08/19/139781956/hold-your-nose-to-avoid-brain-eating-amoebas
https://www.webmd.com/allergies/features/neti-pot-nasal-irrigation-pros-and-cons
https://well.blogs.nytimes.com/2012/09/03/rare-infection-prompts-neti-pot-warning/
http://www.sciencefocus.com/qa/how-much-salt-human-body
https://www.ncbi.nlm.nih.gov/books/NBK21739/

Images:

http://www.thinkstockphotos.com/image/stock-photo-cannonball/490075024
https://en.wikipedia.org/wiki/File:Jalaneti.JPG
https://en.wikipedia.org/wiki/File:TE-Nose_diagram.svg
https://commons.wikimedia.org/wiki/File:Nfowleri_LifeCycle.gif
https://commons.wikimedia.org/wiki/File:Naegleria_fowleri_lifecycle_stages.JPG
QQs: Why does getting water up your nose hurt so much?

[Intro]

So have you ever done a cannonball into a swimming pool or a pond and accidentally,like, shot water all up into your brain through you nose? Neauuh, not a fan! And yet neti pots, those teapot-looking things that people use to squirt water into their noses when they're feeling stuffy, they're like, soothing and relatively painless. Turns out, the difference has to do with the conditions inside your nasal cavaties. 

See,the inside of your nose, as you may have notices, is full of nerve endings. And not to get too up-close-and-personal here, but it's also pretty warm up there, and kind of salty, with a salt concentration of about 0.9%. When you snort up fresh, cold swimming pool water, it's a shock to your system because. it's just so different form the natural environment inside your nose. cold temperature can make you fell like you're having a brain freeze, probably because it's making the blood vessels inside you nose constrict. And since the fresh water doesn't match up with your internal salt concentration, there's an uncomfortable feeling as they try to equalize, and the water flows into your cells. 

Menawhile, your nasal membranes respond to the irritation by secreting a bunch of mucus, which is why your nose immediately starts running. Neti pots, which flush out your sinuses to remove allergens and thin out mucus, get around this by using warm, salty water that matches your internal environment.

But even though neti pots and accidental cannonball snorts feel totally different, they can both put you at risk for deadly infections. Though it's very rare, a snootful of pond water or an improperly cleaned neti pot just might expose you to brean-eating amoebas called Naegleria fowleri. Again, this is very rare, there are only three or four cases in the U.S, each year, but it's a water-dwelling parasite that if you snorted up your nose,can get into your brain and start destroying tissue. 

I'm not saying you've got to give up cannonballs ... but maybe just hold your nose, do the thing that everybody does. You'll get around the pain and the risk of brain-eating infection at the same time! 

Thanks for asking, and thanks especially to all of our patrons on Patreon who keep these answers coming. If you are interested in learning more about the ways which your nose responds to things, you can check out or video on why your nose get all runny when it gets cold outside. 

[Outro]