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Tired eyes

Bags and dark circles under the eyes are typically a telltale sign of one too many late nights (and not enough sleeping in). But if you're getting plenty of shut-eye and still can't shake the basset-hound look, you might want to take a look at your diet.

Eye bags and puffiness are caused by fluid buildup in the thin, loose skin that sits below your bottom eyelid. Lots of things—from allergies to crying jags—can cause fluid to accumulate there, but one of the main culprits is eating too much salt. High-sodium foods promote water retention throughout the body, and the sensitive under-eye area is no exception.

Next: Dry skin