Why do your eyes get red when you're tired?!

Question: Why do your eyes get red when you're tired!?
Answers:

The blood vessels constrict!. Just like when you havent slept and you feel your heart beating faster, the vessel also constrict in your heart!. They get overworked and need rest and its one way of letting you know!.Www@Answer-Health@Com

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Why do your eyes get red when you're tired?!

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