Why does we rub our eyes when we are tired?
In: Biology
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Histamine also helps regulate our sleep/wake cycle. I used to work night shift, and 0200-0600 my eyes itches and my nose ran like crazy.
[Histamine regulation](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6043637/#S4title)
Dry Eye Guy is right to some extend. When your eyelids appear to be heavy you would also get the feeling that foreign particles could be in or around your eyelids, causing you to “rub it out”… When you’re sleeping, your eyes continue to manufacture tears and mucus. But since you’re not blinking, the excess matter gathers in the corners of your eyes and in your eyelashes. So you tend to rub your eyes in the morning.
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I believe it’s because when you’re tired your body isn’t producing as many tears (lubricant) so rubbing them will stimulate your ducts into working which will moisturize those bad boys
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