Tucked inside their favorite pair of running shoes you’ll find what runners consider both a disgusting side effect of the sport and a badge of honor: bruised, black toenails (if the nail is still even ...

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 ...

Trauma or injury commonly causes a black toenail due to bleeding under the nail. Repetitive sports activities can lead to runner's toe, causing the toenail to turn black. Malignant melanoma, a serious ...