Excessive Yawning: Causes and Diagnosis
Yawning is a natural and harmless response to being bored, tired, or sleepy. Yawning is also contagious: research shows that 50% of people yawn involuntarily
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Yawning is a natural and harmless response to being bored, tired, or sleepy. Yawning is also contagious: research shows that 50% of people yawn involuntarily
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