Yawning is an involuntary process where opening the mouth and breathing occurs deeply in the lungs with air. It is a body's natural response against tiredness and sleepiness. Low oxygen levels in the paraventricular nucleus present in the hypothalamus can induce yawning. Yawning also helps bring oxygen into the blood and moves carbon dioxide out of the blood.
Why Am I Yawning So Much? Causes and Solutions
Yawning usually means you are tired or stressed, but if it happens often, it could point to sleep issues, medicines, or even nerve problems.
