Yawning involves opening the mouth involuntarily while taking a long, deep breath of air. This is usually done as a result of
Alternative Names
Excessive yawning
Considerations
Yawning is a normal response to fatigue and drowsiness, but excessive yawning can be caused by a vasovagal reaction. This reaction is caused by the action of a nerve, called the vagus nerve, on the blood vessels. It may indicate a heart problem.
Normal yawning may happen when someone else yawns.
Common Causes
- Drowsiness or weariness
- Disorders associated with excessive daytime sleepiness
- Vasovagal reaction
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Heart attack -
Aortic dissection
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