Why do people cry after yawning?

Because human tears are secreted all the time, flowing on the surface of the eyeball. However, there is very little tears secreted and they flow along the surface of the eyeball and in the tiny spaces inside the eyelids, so you don't feel that the tears are flowing. However, in the blink of an eye, the tears on the surface of these eyeballs are sucked into the nasolacrimal duct, the sewer of the tears.

Don't underestimate this not-so-long tube, it's the only way for tears to reach your nose. The lacrimal glands constantly secrete tears, and the nasolacrimal ducts constantly excrete tears, so people usually do not shed tears. When a person yawns, his mouth is wide open, and he may exhale more than he can out of his body in order to exhale carbon dioxide and inhale oxygen.

With the action of yawning, a stream of gas exhales forcefully from the mouth. The muscles of the cheeks, tongue and throat tense and contract, and the pressure in the mouth and nose increases. As a result of the increased pressure in the nasal cavity, it will temporarily block the work of the nasolacrimal duct to excrete tears, and the "sewer" will not be passed, and the tears will not flow, and more and more tears will accumulate in the eyes.

There will be tears in his eyes, and finally he will burst out of his eyes and flow to his face. In fact, not only yawning can cause tears, but also when people laugh, sneeze, cough, and vomit, and the reason is the same.

Why do people shed tears when they yawn? Star Awareness Project

We yawn when we are very tired, very tired, or sleep deprived, and every time we yawn, we are in tears, why do people shed tears when we yawn?

After yawning, there will always be tears because the pressure of our mouth on the nasal cavity increases, and the nasolacrimal duct is closed, so that the tears do not flow into the digestive tract, they will flow out of the eyes.

(1) The whole process of shedding tears after yawning.

(2) It is normal to shed tears after yawning.

Because there is a very thin tear duct in the eye, it happens to squeeze into it when a person yawns, so tears flow down the tear duct.

Because when you yawn, you will promote your tear glands, but some people may not have very developed tear glands, so they will not shed tears. But most people still cry.

When you yawn, it causes the lacrimal gland system to secrete tears, so tearing occurs.

Usually we have tears in our eyes, but they are in a state of circulation, but we don't feel that tears flow into the lower nasal passages through our tear tubes, tear ducts, tear ducts, and tear sacs, and when we yawn, the pressure in the nasopharynx is too high, so that the pressure in the lower nasal passages increases, and the gas gushes up, which leads to the increase in the pressure in the tear ducts, and the tears cannot flow out smoothly, resulting in the phenomenon of yawning and tears.

People shed tears when they yawn, this is because when we yawn, a large amount of gas will be exhaled from our mouth, and at this time, our nasal pressure will increase, and it is precisely because of the increase in our nasal pressure that our tears flowWhen it comes to yawning, we are not strangers, because this is a thing that everyone will do, how can a person yawn once or twice a day, or even more, we usually think that yawning is because we are sleepy, but sometimes we are not sleepy and will yawn, so it is really difficult to say why people yawn.

Some people think that yawning is due to a lack of oxygen in our brains, because when we yawn, we exhale a lot of carbon dioxide and inhale a lot of oxygen at the same timeIn fact, our tears have always been in a state of secretion, it is precisely because of this that our eyes will always be moist, if we do not secrete tears, our eyes will be very dry, which will make us particularly uncomfortable.

Although tears are secreted all the time, they do not come out of the eyes, because we blink all the time, and there is a channel under our eyes, called the nasolacrimal ducts, and when we blink, the tears will enter the nasolacrimal ducts, so our tears will not flow out of the eyesBut when we yawn, the increased pressure in the nasal cavity will cause the nasolacrimal duct to be blocked, so that the tears cannot flow in, and the tears cannot be secreted normally, so they can only flow out of our eyes, which is why we yawn and tear.

Although yawning is a human habit, people have not stopped studying yawningAccording to the latest research, the reason why people yawn is because they need to cool the brain and prevent the brain from being too hot, because we will inhale a lot of cold air when we yawn, and people with too high a brain temperature will be easily confused or confused.

Why do people cry when they yawn? Because when yawning, the facial muscles tense and squeeze the lacrimal sac, which will cause the tears to flow backwards, resulting in tearing during yawning.

Because when a person yawns, it involves facial expressions, the muscles on the face move, and then the tear ducts, so it will tear.

Why do people shed tears when they yawn? Star Awareness Project

Why do people shed tears when they yawn? Star Awareness Project