Your fingernails might seem like simple protective coverings for your fingertips, but they’re actually sophisticated diagnostic tools that can reveal crucial information about your protein intake.

Medically reviewed by William Truswell, MD If you have yellow nails, this could be a sign of aging, smoking, or yellow nail ...

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 ...

Fingernails help protect the underlying skin from injury, and they also come in handy when you want to scratch an itch or peel a satsuma. But what do they reveal about your health? There's no shortage ...

Longitudinal ridging on fingernails or toenails, also known as vertical ridges, are slender raised lines that run from the base of the nail to its tip. Often appearing as faint vertical stripes, these ...