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Doctor insights on: Yawning

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Yawning (Overview)

Yawning is opening the mouth semi-voluntarily while taking a long, deep breath of air. It is a type of reflex action controlled by the brain (a person cannot yawn on command). Yawning is normal, and usually due to drowsiness or tiredness. However, excessive yawning that happens much more often than normal may be caused by vagus nerve signals, due to some medical problem.


Yawning (Overview)

Yawning is opening the mouth semi-voluntarily while taking a long, deep breath of air. It is a type of reflex action controlled by the brain (a person cannot yawn on command). Yawning is normal, and usually due to drowsiness or tiredness. However, excessive yawning that happens much more often than normal may be caused by vagus nerve signals, due to some medical problem.


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Why do I tears when i yawn?

Why do I tears when i yawn?

normal: When you yawn, the opening of the mouth widely causes a compression of the tear drainage tubing next to the nose. If you have residual tears in your eye, this will cause them to leak over onto your cheek. This is normal and not a problem. ...Read more

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Why do tears come out when I yawn?

Why do tears come out when I yawn?

The muscles used: when yawning are related to the ones that open your tear ducts ...Read more

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What causes uncontrollable yawning?

Yawning: This article presents four different theories about why we yawn: http://science.Howstuffworks.Com/life/inside-the-mind/human-brain/question572.Htm. ...Read more

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Is there a medical explanation for yawning?

Is there a medical explanation for yawning?

High carbon dioxide: Back in medical school, it was explained to me that as we get tired our respiratory rate goes down raising our carbon dioxide level. This rise causes us to yawn and take a deep breath to expel the rising carbon dioxide. It sounded good to me at the time. ...Read more

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Why do people make others yawn when they yawn?

Why do people make others yawn when they yawn?

No definite answer: Contagious yawning has been known since at least the 16th century, but there has yet to be an explanation that stood up under testing. The best was that people have a grouping of "mirror neurons" in their brains that do imitative behaviors, but recent studies show that these neurons aren't activated during contagious yawning. It remains somewhat of a mystery. ...Read more