Why Does Cutting An Onion Make Us Cry? | BYJU'S Fun Facts?

Cutting an onion makes our eyes water because it releases tiny particles that tickle our eyes.

When you slice through an onion, you’re cutting into layers like a layered cake. Each layer has little capsules full of strong chemicals inside them. These chemicals are like sleepy little soldiers waiting to wake up when they're broken open. When the knife cuts through the onion, it breaks these capsules open, and out come the chemicals, which fly into the air.

Our eyes feel the chemicals and think, “Oh no! Something is in my eye!” So they send more tears to wash away the tiny troublemakers, that’s why we cry!

Imagine you're playing with a friend, and suddenly someone throws confetti all over your face. You might blink and squint from surprise, just like our eyes do when they meet these chemicals.

The more layers you cut through, the more chemicals are released, so the more we cry!

If onions were people, they’d be like sneaky little troublemakers who make us cry just for fun!