What is the physiological reason why people shed tears when they yawn?

Everyone should have a sleepy time, after being sleepy, people will yawn unconsciously, and then they will find themselves in tears, sometimes they can't cry when they want to cry, but they will cry when they yawn easily. There may be a lot of people who don't pay much attention to this and think it's okay, but there are still some people who are very concerned. Let's talk to you, why do people shed tears when they are sleepy?

People will unconsciously yawn after being sleepy, when people are sleepy, blood circulation will be slower, and some oxygen in the blood has been consumed, but it can not be replenished in time, at this time the blood oxygen concentration in the human body is relatively low, and the brain will also have a slight lack of oxygen, and the human body yawning is actually inhaling more oxygen, so that the oxygen content in their body will be higher.

When people yawn, the mouth will generally grow very big, at this time the human body is exhaling carbon dioxide, inhaling oxygen, with the action of people yawning and then some facial organs will be tense and contracted, at this time the pressure in the mouth and nasal cavity will increase, resulting in the nasolacrimal duct excretion of tears, that is, tears.

Don't underestimate the nasolacrimal duct, it is because of the nasolacrimal duct that tears will flow out, and the first-class just can't stop, so I often see some people yawning, causing tears to flow directly to the cheeks, and some people don't know and think they are crying. In fact, it is not only people who shed tears when they are sleepy, but also when they laugh or sneeze or cough, and these principles are the same. If you feel that your eyes are dry, you can use these methods to promote the shedding of tears, which is a better way to do it, and it doesn't take much effort, just go at once.

I don't know if you have noticed that when you yawn and cry, you will feel that your eyesight is better than before, and you can see things more clearly, in fact, this is also a normal physiological phenomenon, some people will want to make their eyesight better in a short time, so they use this method.

Some people don't know that they will shed tears when they yawn, and they think that they are a disease, and go to the hospital to see a doctor in fact, yawning and tears are a normal physiological phenomenon, you don't have to worry, this is also a common sense, you can usually know more about life knowledge, this is still very helpful to your life, and sometimes you can also identify whether you have some diseases.

When yawning, the human body is exhaling carbon dioxide and inhaling oxygen, and with the action of yawning, some facial organs will tense and contract, and the pressure in the mouth and nasal cavity will increase, causing the nasolacrimal duct to excrete tears, that is, tears.

When you yawn, your mouth is wide open, and you exhale carbon dioxide and inhale oxygen at the same time, completing the gas exchange. The exhalation of air is stronger, the muscles of the cheeks and throat will be in a more tense state, and the pressure of the mouth and nasal cavity will increase to a certain extent, affecting the excretion of nasolacrimal ducts.

This is all a physiological response, and meditation will have an additional effect, so that the body's circulation is more regular.

It's also a kind of detoxification, and when we relax, these pent-up things come to light.

It is a normal physiological response for people to shed tears when they yawn, because opening their mouth wide will exhale carbon dioxide gas out of their body, and then inhale oxygen gas when they inhale.

Yawning refers to the phenomenon of opening your mouth to inhale when you are sleepy. The term of traditional Chinese medicine is a manifestation of opening the mouth and breathing deeply, with a slight sound. Those who owe it because of drowsiness are not pathological.

Illness is not limited to time. Yawning is frequent, called owing, mainly because of the yin and yang decline, and the body is weak. Therefore, "Jin Jian Yao, Full of Cold Sound, Accommodation and Food Disease" has the saying that "the middle cold family is happy to owe".

People who yawn often yawn with tears. When they yawn, their eyes will always cry. When people yawn, tears are secreted all the time, flowing to the eyeballs.

But they secrete very few tears and flow close to the surface of the eyeball and the microscopic spaces of the eyelids, so you won't feel like the tears are flowing. However, in the blink of an eye, the tears on the surface of these eyeballs are sucked into the sewer - the nasolacrimal duct. Don't underestimate this not-so-long tube, it's the only passage to the nasopharynx.

The lacrimal glands keep secreting tears, and the nasopharyngeal tubes keep excreting tears, so people usually don't shed tears. When people yawn, their mouths are wide open, and the ruler allows them to exhale their breath out of their bodies in order to exhale carbon dioxide and absorb oxygen. With the action of yawning, a powerful gas exhaled from the mouth.

The muscles of the cheeks, tongue and throat tense and contract, and the pressure in the mouth and nose increases. Increased nasal pressure can hinder the work of nasolacrimal duct tear drainage for a while. The "sewer" is blocked, tears can't flow, and more and more accumulate.

They would shed two tears, and finally they would reach their faces. In fact, not only yawning causes tears, but also when people laugh, squirt, cough, and vomit for the same reason.

Yawning is related to the concentration of oxygen in the body's blood. When a person is sleepy, it is actually in a resting state for a long time, the blood circulation is slower, the oxygen in the blood is consumed, but it is not replenished in time, the concentration of oxygen in the blood is low, and the brain shows a mild lack of oxygen. As blood flows through the brainstem, nerve cells in the brainstem that sense the concentration of oxygen in the blood sense it and give nerve instructions to speed up breathing to provide more oxygen.

Yawning is actually a deep breathing process, and people inhale more oxygen for a while, and they also get a little comfort in an instant. When people sit for a long time, exercise less, blood flow is slow, and breathing is slow, which is easy to cause less oxygen in the blood, and it is easy to yawn, which is the reason.

The key here is that the brain is very sensitive to hypoxia, so there is the above reaction. On the other hand, in the state of exercise, the breathing deepens, and even if the muscles are deprived of oxygen, the brain may not be deprived of oxygen, and there is usually little yawning.

As for the tears when yawning, it is because when people yawn, their mouths are wide open, and they exhale as much breath out of their bodies as possible, 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 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.

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

Why do people shed tears when they yawn?

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?

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