Your nails can say a lot about your health: Discoloration, brittleness, and breakage are annoying to deal with on your fingers, but they’re also signs you should watch out for on your toes. One ...

If you're a runner, you know that black toenails are common—but that doesn't mean you have to put up with them. Black toenails are common among marathoners and other serious runners, but you don't ...

When Maria Delgado noticed a dark streak under her big toenail, she assumed it was from dropping her gym bag on her foot. Six months later, that seemingly innocent mark led to a diagnosis that saved ...

Tucked inside their favorite pair of running shoes you’ll find what runners consider both a disgusting side effect of the sport and a badge of honor: bruised, black toenails (if the nail is still even ...

Ingrown toenails occur when the toenail grows into the skin next to the nail. It most commonly affects the big toe. Although an ingrown toenail will not go away without treatment, people can usually ...