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Why Does Getting Water Up Your Nose Hurt So Much?

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

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