Medically reviewed by William Truswell, MD Fingernails grow 3.47 millimeters a month; toenails grow 1.62 millimeters a month.Taking biotin supplements may strengthen nails and promote their ...

Since toenails grow very slowly, especially in adults, the trapped blood can remain visible for several months and gradually ...

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 ...