Have you ever taken off your nail polish only to notice a dark line on the nail running vertically down your finger? These ...

(NEXSTAR) – What started out as a “tiny little brown line” on one woman’s fingernail led to a rare, potentially life-threatening medical condition, one that she’s now trying to help others catch early ...

You might think of your nails as merely cosmetic or practical features, good for scratching an itch or holding your favorite nail polish. But these small, seemingly simple structures actually serve as ...