why am i yawning so much but not tired

Yawning a lot without feeling tired can happen for several reasons besides sleepiness. Possible causes include stress or anxiety, changes in body temperature, stimulation of the vagus nerve, or being bored. Excessive yawning can also be related to underlying health issues such as sleep disorders like sleep apnea or narcolepsy, medication side effects, or neurological conditions. Other medical factors like vasovagal reactions (which involve a sudden drop in heart rate and blood pressure) can also cause frequent yawning even if you don’t feel tired. In short, yawning is not always an indicator of sleepiness; it can be the body's way to regulate brain temperature or respond to stress or other physiological triggers. If the yawning is persistent or associated with other symptoms, it may be worth discussing with a healthcare provider to rule out underlying conditions.