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Doctor insights on: Yawn Yawning Brain Oxygen

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Why do people yawn? I heard yawning is a sign that your brain isn't getting enough oxygen. Is this true?

Why do people yawn? I heard yawning is a sign that your brain isn't getting enough oxygen. Is this true?

True: Yawning is a sign of tiredness. Additionally, when your carbon dioxide (the gas given off with exhaling) level starts to rise in your body, it does stimulate the brain to cause you to yawn. The theory is that the yawning will cause you to take a deep breath and inhale more oxygen and exhale the excess carbon dioxide. ...Read more

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Yawning (Definition)

Yawning is opening the mouth semi-voluntarily while taking a long, deep breath of air. It is a type of reflex action controlled by the brain (a person cannot yawn on command). Yawning is normal, and usually due to drowsiness or tiredness. However, excessive yawning that happens much more often than normal may be caused by vagus nerve signals, due ...Read more


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Sometimes i can't breathe deeply its like there is not enough oxigen want to yawn but can't doctors said no problem with heart lungs brain. Just nervous?

Sometimes i can't breathe deeply its like there is not enough oxigen want to yawn but can't doctors said no problem with heart lungs brain. Just nervous?

Anxiety, asthma: Sometimes asthma can present with chest tightness without coughing, wheezing or sob. You can go for hrs., feeling like you can't get a good breath. Anxiety can cause this, but usually it doesn't last more than several minutes to 1/2 hr.If this feeling lingers, ask your doctor if this could be asthma. ...Read more

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Could shortage of oxygen cause yawning?

Could shortage of oxygen cause yawning?

Yawning: Is present in most mammals and it's a defense mechanism in these species against a process called atelectasis, which is a collapse of some alveoli due to shallow breathing and weight of the lungs. ...Read more

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Why i keep yawning and feel short of oxygen?

Normal: Yawning is your body's way of letting you know you are short on oxygen. This is a normal process. ...Read more

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Why do people yawn when there not tired or sleepy and feel like not getting enough oxygen?

Why do people yawn when there not tired or sleepy and feel like not getting enough oxygen?

Yawning: Scientists speculate that the onset of a yawn is triggered either by fatigue, or by sheer boredom as, at those times, breathing is shallow, and little oxygen is carried to the lungs by the oxygen-toting cardiovascular system. When one yawns, his or her alertness is heightened, as the sudden intake of oxygen increases the heart rate, rids the lungs and the bloodstream of the carbon dioxide buildup, . ...Read more

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Is it true tht U yawn nt bc your bored tired or stress but bc your nt getting enough oxygen bc I feel that way when I'm short of breath ?

Several theories: Yawning (oscitation) most often occurs in adults immediately before and after sleep, during tedious activities and as a result of its contagious quality. Theories involve yawning to get more oxygen to remove a build up of Carbon Dioxide, Boredom, an evolution theory (because our ancestors did it), and a "brain cooling" theory. ...Read more

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Does yawning mean someone may be low on oxygen? I.E. They try to get more oxygen with a deep breath perhaps?

No: This explanation for yawning is a common urban legend but there is little to support it. In fact the reason we yawn is not entirely clear. ...Read more

Dr. Scott Bolhack
3,072 doctors shared insights

Oxygen (Definition)

Oxygen is a gas that the cells in your body need to work properly. The air we breathe normally has 21% oxygen. A maximum of 100% oxygen can be given. Babies with heart or lung problems may need ...Read more


Cerebrum (Definition)

Cerebrum essentially refers to the majority of the brain. Embryologically, it develops from the telencephalon, and together with the diencephalon, ...Read more