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Why Do We Yawn?

why do we yawn

Story at-a-glance -

  • Yawning starts before you’re born and continues throughout the rest of your life, often associated with being tired or bored
  • Research demonstrates that yawning may be the result of your body attempting to cool your brain, which gets overheated when you’re sleep deprived or exhausted
  • Yawning may help you bond more closely with your dog, but you should not experience excessive yawning, which may indicate medical problems such as multiple sclerosis, heart attack or liver failure

By Dr. Mercola

Yawning starts before you're born and has often been associated with boredom or being tired. But, research now suggests there is more to this simple behavior than you may have imagined. It is as involuntary as breathing in many cases and likely has more than one trigger.

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