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 ...

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 ...

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 ...

If you’ve been ramping up your running routine, you’re probably bracing yourself for a few of the unpleasant but common side effects of increasing your mileage—blisters, muscle tightness, and next-day ...