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Hank explores a vexing question asked at picnics and beach parties everywhere: Why do bug bites itch? To help you understand the answer, he takes you into the blow by blow of a bug bite which, we warn you, is pretty horrifying.----------Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/artist/52/SciShowOr help support us by subscribing to our page on Subbable: https://subbable.com/scishow----------Looking for SciShow elsewhere on the internet?Facebook: http://www.facebook.com/scishowTwitter: http://www.twitter.com/scishowTumblr: http://scishow.tumblr.comThanks Tank Tumblr: http://thankstank.tumblr.comSources:http://www.cdc.gov/niosh/topics/insects/http://phenomena.nationalgeographic.com/2013/08/06/heres-what-happens-inside-you-when-a-mosquito-bites/http://www.astrographics.com/GalleryPrintsIndex/GP2108.htmlhttp://www.news-medical.net/health/What-is-Histamine.aspxhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC2519061/