Why do I cry every time I yawn?

Why do people shed tears when they yawn.

When I'm sleepy, I always yawn. When you yawn, your eyes will always be full of tears, why do people shed tears when they yawn?

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.

I'm in tears after yawning, it's normal

I'll !! too.

Maybe I'm too tired.

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?

Yawning and tears are normal physiological phenomena of the human body, the principle is that in the process of yawning, the mouth is opened very wide, the nasolacrimal duct is blocked, and tears cannot flow into the nasal cavity, but overflow from the eyes, so there will be yawning accompanied by tears.

Tears are not secreted only when crying, they are secreted all the time, and yawning causes the muscles of the face and throat to contract, causing the pressure in the nasal cavity to increase, the tears stop being excreted, and the tears accumulate in the eye sockets and then flow down.

Cause analysis. Yawning causes muscle tension and contraction in the face, tongue, and throat, causing increased pressure in the nasal cavity, and the nasolacrimal duct stops the excretion of tears, causing tears to accumulate in the eye sockets and then flow down.

Initiatives are proposed. Yawning can be a sign of lack of oxygen and sleepiness in the brain, and is used to indicate that the brain is very tired and needs to rest. Therefore, when this happens, it is best to go to rest immediately and make up for sleep. Usually exercise more and develop the habit of going to bed early and waking up early.

When you yawn, your eyes will tear because your eye muscles compress the tear glands in your eyes.

When we yawn, why do we sometimes shed tears?

Because there is a lacrimal gland on the outside of each of the two eye sockets of a person. The lacrimal glands secrete tears all the time, flowing on the surface of the eyeball. Normally, the lacrimal glands secrete very little tears, and these tears are constantly flowing through the lacrimal glands into the nasal cavity, so people can hardly feel that they are crying.

However, when a person opens his mouth wide and yawns, a stream of gas rushes out of his mouth, and the pressure in the mouth is very high, and the pressure in the nasal cavity also increases, and the tear duct will be blocked, and the tears will not flow. At this time, tears can only flow from the eye sockets.

In fact, not only do people cry when they yawn, but they also cry when they laugh, sneeze, vomit, and cough, and the reason is the same.

There is a tube in the eye (inner corner of the eye - scientific name medial canthus) that is the same as the nasal cavity, called the nasolacrimal duct, and the tears on the surface of the eyeball (not only secreted when crying, but always have a small amount) flow from this tube to the nasal cavity (saving everyone from washing their faces with tears all day long). When you yawn, due to the hideous facial expression, the nose is wrinkled, and the nasolacrimal duct is squeezed, and part of the tears stored in it go upwards and flow out of the eye sockets (so there are tears) and part downwards and flow into the nasal cavity (so there is nasal discharge).

The human eye is always watery because the tear glands in the eye secrete tears all the time, but they usually secrete very little, and only flow in the tiny spaces along the surface of the eyeball and the eyelids, keeping the eyeball moist and not feeling the flow of tears.

However, the moment you blink, tears from the surface of your eyes are sucked into the nasolacrimal ducts--- the only way for tears to pass through your nose. The lacrimal glands are constantly secreted, and the nasolacrimal ducts are constantly excreted, so people usually do not shed tears.

When a person yawns, a strong breath of gas comes out of the mouth, causing the existing tension in the cheeks, tongue and throat to contract, causing increased pressure in the nose and mouth. The increased pressure in the nasal cavity prevents the nasolacrimal duct from excreting tears, and the tears that accumulate in the eyes accumulate more and more, and finally burst out of the orbit and flow to the face.

To put it simply.

Tears are flowing.

Flows into the nasal cavity. And then to the throat you a dozen yawns.

The nasolacrimal duct, the passage from the eyes to the nasal cavity, was blocked.

There is no place for tears.

It's just a matter of rewinding.

And he came out of his eyes, and sprinkled.

Because when you yawn, your mouth opens, which drives the nerves in your face and pulls the tear ducts, and the tears are squeezed out.