Why does our eyes and nose turn red when we cry? Anyone knows what happens in our body?

Answer 1

Blood runs into the eyes and the face b/c of irritation. Certain hormones are released (seratonin, etc.) that cause the muscles to react. Let me find some details, I'll get back to you. :-)

Answer 2

The blood answer is correct. More blood sent there. Not quite sure why we evolved to do this, though.

But another half of the story is that our color vision has evolved to be able to see exactly these kinds of skin-color changes (e.g., blushing too). So, a color-blind person can hardly see these changes you mention.

One possibility is that more blood is sent to these spots when crying not because blood is needed there for some physiological reason, but there is instead some kind of skin-color-signalling reason for sending the blood there, like blushing, which appears to be a purposeful skin-signal, not just a side-effect physiological changes. You are telling others about your feelings when you redden in this way when crying, and others have color vision that evolved to be optimized for listening to exactly this kind of communication.

Answer 3

Trips pretty much has it.

Also, if you have alergies...histamine is released and that irritates the surrounding cells and causes the uncomfortable sneezing and redness in your skin...if it's a skin allergy.

Answer 4

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Answer 5

let's cut and see.