Why do our eyelids seem so hard to lift when we’re tired?

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Why do our eyelids seem so hard to lift when we’re tired?

In: Biology

When you get tired, your muscles are also tired/you don’t want to use them too much. Your eyelids aren’t just skin, they have muscle as well (and when muscles get tired, they can get weaker/feel heavier). Eyelids especially are quite prone to this sort of heavy feeling because you use them frequently during the day, especially when reading and concentrating on close objects. It also explains why when you rub your eyelids when tired, it feels good (kinda like a muscle massage).