Why do you get bags under your eyes when you're tired?

A cold shower and a cup of coffee may help you mentally recover from a sleepless night, but the telltale circles under your eyes announce to the world that you're feeling tired. read more

You may notice smudges and shadows under your eyes in the morning or at the end of a long day, but doctors define dark circles as uniform, round areas of darker pigmentation that appear under both of your eyes, according to the Mayo Clinic. read more

And that, she says, is what often makes people with bags under their eyes look tired. But these explanations can’t really account for the more transitory sort of under-eye bags, the sort you get when you just haven’t gotten enough rest. read more