Yawning is like a stretch for your brain. When you’re tired, your brain needs more oxygen to stay awake, and yawning helps it get that oxygen. Imagine taking a big breath in and stretching your whole body, that’s kind of what happens inside your head when you yawn!
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See also
- Why Do We Yawn When We’re Tired or Bored?
- What Causes People to Yawn When They’re Tired?
- Why Do We Yawn When We're Tired?
- Why Do We Yawn When We Are Tired?
- Why Do Humans Yawn When They’re Tired?
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