So what exactly is it that makes a hangover suck so hard? Turns out there are three things interacting to make you feel miserable. Hank's got the details in this episode of SciShow. (Having déjà vu? This video was accidentally uploaded earlier in the week, prior to its scheduled posting date, and without a description or annotations. We removed that video and have uploaded this video, which is the same as that one, but with those assets. Sorry for any confusion!) 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: dftba.com/artist/52/SciShow -- Looking for SciShow elsewhere on the internet? Facebook: www.facebook.com/scishow Twitter: www.twitter.com/scishow Tumblr: scishow.tumblr.com SOURCES www.mayoclinic.com/health/hangovers/DS00649 www.nytimes.com/2011/12/29/fashion/new-products-to-treat-hangovers.html?_r=0 www.scientificamerican.com/article.cfm?id=why-do-hangovers-occur urbanlegends.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=urbanlegends&cdn=newsissues&tm=443&f=20&su=p504.6.342.ip_&tt=2&bt=1&bts=10&zu=http%3A//www.bbc.co.uk/dna/h2g2/alabaster/A103140 science.howstuffworks.com/life/human-biology/hangover.htm www.popsci.com/science/article/2012-05/fyi-can-drinking-moonshine-really-make-me-go-blind pubs.niaaa.nih.gov/publications/aa55.htm www.theatlantic.com/magazine/archive/2012/09/does-tequila-make-us-crazy/309058/