Yawning is mostly involuntary, meaning you don't have control over it. And most scientists consider it a reflex. However, you can make yourself yawn by breathing in gradually while retracting the tip of your tongue and opening your jaw repetitively. In addition, seeing other people yawning often triggers one.

Yawing clearly is associated with sleepiness and boredom. However, almost paradoxically, it is theorized that yawning is not a sign of sleepiness or boredom, but actually a reflex that your brain induces to wake you up or make you more alert.

She yawned, and stretched lazily. They looked bored and yawned at the speeches. Rosanna stifled a huge yawn. The debate was a mockery.

Heart problems—If yawning excessively is accompanied by chest pain or an irregular heartbeat, it could be a sign of a heart condition. Stroke—Sudden, severe yawning could be a warning sign of an impending stroke. Brain tumor—In rare cases, yawning excessively can be a symptom of a brain tumor.