Do you know about this trick, how to chop onions without having the tears.
Ok, here it goes: Put a little bit of water in your mouth.
That’s it! Just some plain water in your mouth while cutting the onion and Bye Bye Tears!!!
What's the medical reason behind it?
It’s due to the fact that we are only breathing through the nose by doing so. So basically, just keeping the mouth closed should work just as fine, but it’s probably not as easy as it sounds.
Try it out yourself...