Why do we yawn?

We yawn because our body feels sleepy. Your mouth opens wide. Air goes in. Your face gets a big stretch. Then you may feel more awake.

We yawn when our body is sleepy, bored, or changing from rest to action. The brain sends a message, and your mouth opens wide. You take a big breath and stretch your face. It can help you feel a little more awake, like a big stretch after a nap.

A yawn is a reflex, which means your body does it without you deciding. When you are tired, bored, or waking up, your brain sends a signal. Your mouth opens, you take a deep breath, and your face and throat stretch. Scientists think yawning helps your brain and body switch states and wake up a bit. Fun fact: yawns can spread. Seeing, hearing, or even reading about yawning can make some people yawn too.