Ingrown toenails are super common, but also really uncomfortable to live with. They can be caused by heredity, trauma, poor grooming or even the shoes you wear. The pressure from the curved edges of a ...

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 ...