Listen up, polish junkies! The thought of fluttering your fingernails sans polish may feel just plain wrong (our nails wouldn’t be the same without their wardrobe of glossy, matte or glitter finishes), but it might be time to reconsider. Why? The state of your bare nails can tell you a lot about your overall health: peeling, ridges, and brittleness are unsightly, but might also be your body’s cry for help.