Athletes and runners often get a condition called runner’s toe, which is a blackened toenail caused by repeated strain on your foot. It's not dangerous, but it can be very painful, and there are ways ...

For many, running is a passion, an escape, and a fantastic way to stay fit. However, for some, it comes with an unwelcome guest: the black toenail. While not usually serious, it can be painful and ...

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My friend says you have written about black toe nails before. Neither he nor I can find that article! I always get black toenails as I increase my mileage or run on snowy paths; sometimes I lose my ...

If you're a runner, you know that black toenails are common—but that doesn't mean you have to put up with them. Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a ...