The theory of "yawning is contagious" has been studied for hundreds of years. So why yawn? Why are you crying after yawning?
Yawning is a "infectious disease"
People will yawn from birth until the end of their lives. And so is animals.
Simply put, yawning is a "infectious disease". As long as someone around yawning, we will unconsciously follow us, regardless of whether we are sleepy or not.
In fact, during the communication process, we will imitate some other people's expressions, actions, emotions and behaviors. The unique copying phenomenon of is called "unconscious imitation".
The "contagiousness" of yawning is also the product of unconscious imitation.
The time for yawning at a time is about 6 seconds. During this period, causes people to close their eyes and plug and listen, and the nerves and muscles of the whole body are completely relaxed.
Therefore, it can be believed that yawning gives people the best physiological and psychological rest, and has an important physiological protection effect on the human body.
In a study, participants yawned in front of dogs, and the results showed that 72% of dogs also began yawning.
In other words, in addition to mutual infection between the same species, will also have this reaction between different species.
For example: Just like your home kitten, it watches you yawn, and then it will also yawn with you.
Some people think that yawning is a hypnosis method.
wants you to enter a sleep state, often yawning constantly to remind the human body, indicating that the brain is tired and needs to sleep and rest.
But some people think that yawning is actually a cooling mechanism for the brain. Before yawning, the brain's working temperature is "too high", so it cools down through gas heat exchange.
Yawning may be a head cooling method?
's different explanations for the reasons for yawning make the handling of this matter very controversial.
Some people here also believe that yawning is due to hypoxia .
According to the latest research conclusions of American scientists, also believes that yawning is to cool the brain and thus keep the brain healthy and sober.
They believe that the cold air inhaled when yawning will quickly lower the temperature of the blood on the face and then cool the brain. Since people will cause the brain temperature to rise when they are tired, they must cool the brain by yawning.
Is yawning good for the human body?
Yawning can promote deep breathing and improve blood oxygen saturation. allows brain and body cells to get more oxygen.
In addition, can also enhance the reaction speed, make thinking more active, improve judgment, and improve work efficiency.
But you can't yawn anyway.
Frequent yawning may be caused by kidney deficiency .
Traditional Chinese medicine believes that the kidney is the basis of congenital. When the patient has symptoms of kidney deficiency, it is easy to cause poor circulation of qi and blood throughout the body, making the body unable to get sufficient nourishment of qi and blood, causing the patient to experience symptoms of fatigue and fatigue, which can lead to frequent yawning.
, but it cannot be ruled out that it is caused by overwork. If the patient has serious symptoms, he or she can go to the hospital for treatment in time and actively treat it under the guidance of a doctor according to his or her own situation.
It is worth mentioning that you must not use too much force when yawning.
Let’s look at a few cases,
On November 21, 2017, China Radio and Television said:
A 30-year-old man almost died after yawning. was yawning one night when he was watching TV at home. Unexpectedly, his chin was dislocated because his mouth was too wide, making him unable to breathe.
Fortunately, he was seeking medical treatment in time, so he put his chin back to his original position.
July 31, 2020, according to Global Network :
A 23-year-old man felt sleepy while on night shift. He had just yawned and his lungs "exploded" and bleeding by 2,000 ml.
Fortunately, it was discovered in time. It was diagnosed as spontaneous hematophithroat by , Guangzhou First People's Hospital, and was discharged from the hospital after emergency treatment.
This tells us that there are also dangers when yawning.
yawning should be opened correctly, and do not use too much force to cause dislocation of your chin or some dangers.
Why do you cry when yawning?
People's tears are secreted all the time and flowing on the surface of the eyeball. When a person yawns, his mouth opens very much. is to exhale carbon dioxide and inhale oxygen.
As the yawning movement was yawning, a stream of gas exhaled strongly from the mouth. The muscles in the cheeks, tongue and throat tighten and contract, and the pressure in the oral and nasal cavity increases.
The result of increasing nasal pressure will temporarily block the work of the nasal lacrimal duct to excrete tears. The "sewer" is blocked and the tears cannot flow, and more and more tears accumulate in the eyes. will have tears in her eyes, and finally burst out from her eyes and flow to her face.
In fact, not only will yawn and shed tears, but people will also cause such tears when laughing, and the truth is the same.
In short, yawning is a very common thing in life.
But for those who often yawn, such yawning may be a reminder to adjust your work and rest as soon as possible and replenish your sleep.
Therefore, if friends who see this are sleepy, then go and have a rest!

Fortunately, it was discovered in time. It was diagnosed as spontaneous hematophithroat by , Guangzhou First People's Hospital, and was discharged from the hospital after emergency treatment.
This tells us that there are also dangers when yawning.
yawning should be opened correctly, and do not use too much force to cause dislocation of your chin or some dangers.
Why do you cry when yawning?
People's tears are secreted all the time and flowing on the surface of the eyeball. When a person yawns, his mouth opens very much. is to exhale carbon dioxide and inhale oxygen.
As the yawning movement was yawning, a stream of gas exhaled strongly from the mouth. The muscles in the cheeks, tongue and throat tighten and contract, and the pressure in the oral and nasal cavity increases.
The result of increasing nasal pressure will temporarily block the work of the nasal lacrimal duct to excrete tears. The "sewer" is blocked and the tears cannot flow, and more and more tears accumulate in the eyes. will have tears in her eyes, and finally burst out from her eyes and flow to her face.
In fact, not only will yawn and shed tears, but people will also cause such tears when laughing, and the truth is the same.
In short, yawning is a very common thing in life.
But for those who often yawn, such yawning may be a reminder to adjust your work and rest as soon as possible and replenish your sleep.
Therefore, if friends who see this are sleepy, then go and have a rest!

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