If you have a particularly strong gag reflex, this popular dentist's trick can help distract your brain and save you the discomfort (and embarrassment) in seconds.
This isn't a new discovery, but it's one many of us hadn't heard of before, so we thought it worth sharing. If you're in a situation where something is setting off your gag reflex (dentist's offices are one of the most common places), just form a fist with your left hand, squeezing your thumb. The folks over at Reddit's Ask Science forum deliberate as to why this is, and they point to a 2008 study that shows it to be effective—not to mention lots of anecdotal evidence on the internet—but whether it's an effect of the nerves in your hand or just a distraction, it looks like it's a pretty useful trick. Of course, it's a bit different for everybody, so your mileage may vary, but it's something to think about the next time you're sitting in the dentist's chair. Hit the link to read more.
Why does making a fist with your left hand and squeezing your left thumb disable your gag reflex?