Most of the time, yawning is caused by fatigue or boredom. If you went to bed later or woke up earlier than normal, skipped your morning cup of coffee, or had a strenuous or stressful day, your yawning is both easily explained and normal. Sometimes, however, you may notice that you are yawning more than normal for no apparent reason. If your yawning seems excessive or bothersome, see your doctor for a physical exam to rule out health problems.
Sleep Disorders
If you are not able to identify the cause of your fatigue and yawning, you may have a sleep disorder that is preventing you from getting the rest that you need. Sleep apnea is a disorder that is characterized by pauses in respiration during sleep, explains the National Heart Blood and Lung Institute. When you stop breathing, your will snore, gasp or choke in order to get oxygen into your body. If this happens over and over again in a single night, you may find yourself yawning excessively and nodding off during the day; this warrants a visit to your doctor. Other common sleep disorders include insomnia, restless legs syndrome and narcolepsy.
Seeing Others Yawn
According to MedlinePlus, simply seeing someone else yawn or thinking about yawning may prompt you to yawn as well. While reading an article about yawning, for example, you may yawn several times. This is normal and not anything to be concerned about.
Vasovagal Reaction
Occasionally, yawning may be caused by a vasovagal reaction. MayoClinic.com describes this type of reaction as one where your heart beats more slowly and the blood vessels in your legs widen. When this happens, your blood pressure becomes lower and you may faint. Before you faint, you may experience yawning, nausea, lightheadedness or tunnel vision. This type of episode usually does not require treatment, but if it happens more than once, your doctor may need to evaluate you for heart problems or other health issues. In rare cases, yawning may be a symptom of a heart attack.
Medications
Certain medications may cause you to become sleepy and yawn excessively. Common culprits may include antidepressants, pain medications and tranquilizers. If you have recently started a new medication and experience excessive yawning, contact your health care provider for advice.
