Why do our eyes water when we are tired and yawn?

Peak Warming Man said:

Why do our eyes water when we are tired and yawn?

guessing, to flush the glands that make them?

Your search term is “reflex tears”

Peak Warming Man said:

Why do our eyes water when we are tired and yawn?

And laugh.

PermeateFree said:

Peak Warming Man said:

Why do our eyes water when we are tired and yawn?

And laugh.

Buffy said reflex tears

https://en.wikipedia.org/wiki/Tears

The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye’s environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. It can also occur with bright light and hot or peppery stimuli to the tongue and mouth. It is also linked with vomiting, coughing and yawning. These reflex tears attempt to wash out irritants that may have come into contact with the eye.

buffy said:

Your search term is “reflex tears”

Roger.

Peak Warming Man said:

buffy said:

Your search term is “reflex tears”

Roger.

I think tears whilst rogering are a completely different thing…

The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye’s environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. It can also occur with bright light and hot or peppery stimuli to the tongue and mouth. It is also linked with vomiting, coughing and yawning. These reflex tears attempt to wash out irritants that may have come into contact with the eye.
________________

Not really satisfactory, why does yawning trigger the reflex tears?

Peak Warming Man said:

The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye’s environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. It can also occur with bright light and hot or peppery stimuli to the tongue and mouth. It is also linked with vomiting, coughing and yawning. These reflex tears attempt to wash out irritants that may have come into contact with the eye.
________________

Not really satisfactory, why does yawning trigger the reflex tears?

maybe the scrunching up of the face squeezes the sacs that contain the tears.

Peak Warming Man said:

The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye’s environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. It can also occur with bright light and hot or peppery stimuli to the tongue and mouth. It is also linked with vomiting, coughing and yawning. These reflex tears attempt to wash out irritants that may have come into contact with the eye.
________________

Not really satisfactory, why does yawning trigger the reflex tears?

Best guess answer

The emotional response system is linked to the tear system so there is some sympathy muscle involvement?

I’ll find the answer later. I’m doing food at the moment.

buffy said:

I’ll find the answer later. I’m doing food at the moment.

paces up and down

ChrispenEvan said:

Peak Warming Man said:

The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye’s environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. It can also occur with bright light and hot or peppery stimuli to the tongue and mouth. It is also linked with vomiting, coughing and yawning. These reflex tears attempt to wash out irritants that may have come into contact with the eye.
________________

Not really satisfactory, why does yawning trigger the reflex tears?

maybe the scrunching up of the face squeezes the sacs that contain the tears.

It all has to do with anatomy. Your tears are produced by the lacrimal gland, a small structure that sits just beneath your eyebrows toward the sides of your face in each eye. When you yawn, you might place pressure on these glands to release more tears temporarily. Basal tears also normally flow diagonally across the eye to be collected by the opposite corner in a structure called the punctum, but tightly shut eyes during a yawn close this drainage opening off.>/i>

https://www.lasikmd.com/blog/eyes-water-yawn

ChrispenEvan said:

ChrispenEvan said:

Peak Warming Man said:

The second type of tears results from irritation of the eye by foreign particles, or from the presence of irritant substances such as onion vapors, perfumes and other fragrances, tear gas, or pepper spray in the eye’s environment, including the cornea, conjunctiva, or nasal mucosa, which trigger TRP channels in the ophthalmic nerve. It can also occur with bright light and hot or peppery stimuli to the tongue and mouth. It is also linked with vomiting, coughing and yawning. These reflex tears attempt to wash out irritants that may have come into contact with the eye.
________________

Not really satisfactory, why does yawning trigger the reflex tears?

maybe the scrunching up of the face squeezes the sacs that contain the tears.

It all has to do with anatomy. Your tears are produced by the lacrimal gland, a small structure that sits just beneath your eyebrows toward the sides of your face in each eye. When you yawn, you might place pressure on these glands to release more tears temporarily. Basal tears also normally flow diagonally across the eye to be collected by the opposite corner in a structure called the punctum, but tightly shut eyes during a yawn close this drainage opening off.

https://www.lasikmd.com/blog/eyes-water-yawn

How much detail do you need? But I think the answer might actually be Nobody knows

“Other Reflexes Associated with Lacrimation

That bright light causes lacrimation is common knowledge,but the pathways that produce this reflex remain poorly understood. Strong gustatory stimuli may also cause lacrimation. Presumably, the gustatory-lacrimal reflex operates between the gustatory nuclei and the salivary nuclei (including
the lacrimal nuclei) in the brain stem. Lacrimation can also be a part of the complicated synkineses of yawning, coughing, and vomiting.”

From here:

https://www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0ahUKEwj31p2x-_rbAhWDq5QKHTmbD9sQFghYMAQ&url=http%3A%2F%2Fcdmbuntu.lib.utah.edu%2Futils%2Fgetfile%2Fcollection%2FEHSL-NOVEL%2Fid%2F1566%2Ffilename%2F1602.pdf&usg=AOvVaw2kzcPIPPilBDOy9D7UB0EP

Sorry, don’t know how to make that smaller. It’s a pdf from a good journal. There is all you could possibly want to know about the anatomy in that paper.