"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When it comes to annoying skincare woes like butt acne or keratosis pilaris (those little bumps you ...

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 ...

Both a bane to runners and—in some strange way—a badge of honor, the black toenail, or subungual hematoma, is actually blood collecting underneath your nail. It can occur from acute or chronic injury, ...

Thanks Andrea for the excellent question. There are no articles I’ve read that find that people are prone to black nails. Perhaps we need a better understanding. Bleeding that occurs under a toenail ...