ELI5: Explain Like I'm 5

Laughter-induced syncope

Okay kiddo, have you ever laughed so hard that you felt like you were going to pass out? Well, that's what we call laughter-induced syncope.

Syncope is just a fancy word for fainting or passing out. When we laugh really hard, our body goes through a lot of changes. We start to breathe faster and our heart rate goes up. This is because our brain is sending signals to our body that are making us feel happy and excited.

Sometimes, if we keep laughing really hard for a long time, all of those changes can make our blood pressure drop suddenly. This means that not enough blood is going to our brain, and this can make us feel faint or dizzy.

It's kind of like when we blow up a balloon really fast and then let all the air out suddenly. Our balloon becomes floppy and loses its shape just like our body can become floppy and lose control when we faint.

Laughter-induced syncope is not usually dangerous, but it's always a good idea to take a break and catch your breath if you're laughing really hard. Make sure to sit down or lie down if you start feeling faint so you don't hurt yourself.

So, there you have it kiddo! Laughter-induced syncope is just when we laugh so hard that our blood pressure drops suddenly and we feel faint or dizzy. Just remember to take a break and catch your breath if you're laughing really hard for a long time.