“Yawning often occurs when we’re tired – likely as a mechanism to increase oxygen intake and regulate brain temperature,” explains Dr Ann Nainan, a GP and founder of The Travelling Doctor.

Yawning more when tired may be linked to cooling the brain, regulating oxygen, and social bonding, all of which help combat ...

The average adult yawns about 20 times a day. But why? Surely we cannot all be that tired. The truth is the science behind yawning is much more complex than just a few hours too little sleep.

So, why do we yawn when tired? Yawning is sometimes associated with fatigue, and given that you’re more likely to feel drowsy in warm temperatures, the links appeared to make sense. Some tests ...

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