A member asked:

Does yawning mean someone may be low on oxygen? i.e. they try to get more oxygen with a deep breath perhaps?

A doctor has provided 1 answer
Dr. Michael Depietro answered

Specializes in Pulmonary Critical Care

No: This explanation for yawning is a common urban legend but there is little to support it. In fact the reason we yawn is not entirely clear.

Answered 2/27/2012

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