Why do people yawn and exactly what's happening when someone yawns?!

It's a mental issue!. You're body is responding to something that it sees and realizes that your body could use that!. When someone yawns, it's because they lack oxygen!. When you see someone do that, your body realizes that you are also lacking what it needs!. Therefore will yawn to remind itself that it needs oxygen to survive!.

Just so you know, I yawned when answering this question!.Www@Answer-Health@Com

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The exact causes of yawning are still undetermined!. The claim that yawning is caused by lack of oxygen has not been substantiated scientifically!.[3] Some claim that yawning is not caused by lack of oxygen, for the reason that yawning allegedly reduces oxygen intake compared to normal respiration!. [3] Another speculated reason for yawning is nervousness and is also claimed to help increase the state of alertness of a person - paratroopers were noted yawning right before their first jump!.Www@Answer-Health@Com

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Everybody yawns

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