A word of advice to Gizmodo: Triple Verify your sources
I came across this article by Brent Rose on Gizmodo:
The World's 19 Weirdest Hangover Remedies
When you travel the world, having a few drinks with your hosts is a great way to get a sense of the local culture. But excessive alcohol consumption can cause physiological consequences. Don't worry—a hangover is universal, and your new friends probably already know a way to cope with it.
Which also included:
3. Puerto Rico
Supposedly, drinkers in Puerto Rico have figured out how to prevent a hangover. Before an evening of indulgence, they rub a slice of lemon (or lime) into the armpit of their drinking arm. You read that right. It supposedly prevents dehydration.
A few thoughts on this:
A) There's no way it works. Like, at all. There is zero science behind it.
Come on guy. I have never seen this, and anyone who told you so is taking you for a ride. I would double and triple check things before publishing them on such a widely viewed website.