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 ...

Here’s some good advice for dealing with a peculiar beauty trend happening this summer: Look down at your own risk. Long toenails — styled, of course — are apparently popular among certain people, and ...

Let’s start with this, Runner’s Toe, aka black toenails from running, is not required to be in the club and is not a 100% certainty for all runners. We often treat our injuries like war stories. Each ...

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 ...

I had the same problem during my first London Marathon. Now I slip a bit of padding under the tongue of my shoe to stop my toes sliding forward, and black toenails are a thing of the past. What works ...