Yawning excessively happens when the act of yawning occurs frequently or in close succession. When you yawn, your mouth opens and you take a long and deep ...
Yawning excessively happens when the act of yawning occurs frequently or in close succession. When you yawn, your mouth opens and you take a long and deep breath. It may also be triggered by viewing someone else yawning.
The exact reason of human yawn is unknown but common causes are here:
Psychological or emotional causes
Excessively yawning may be the sign of sleep disorder like sleep apnea and may also occur in the presence of heart disease.
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