There's nothing better than going for a swim on a hot summer day! Sometimes, though, when you jump in the water, you might get a whole bunch of it up your nose! It's no fun, but why exactly does it hurt so much? ---------- Love SciShow Kids and want to help support it? Become a patron on Patreon: https://www.patreon.com/scishowkids ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow 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#1 http://www.sciencefocus.com/qa/how-much-salt-human-body https://www.ncbi.nlm.nih.gov/books/NBK21739/