The League of Legends Championship Series (LCS) is the name of two professional League of Legends eSports leagues run by Riot Games. Twenty teams compete in two separate competitions in North America and Europe, with ten teams per continent.
When Toes Turn Dark. Nails change colors for multiple reasons. The most common culprit for a black toenail is blood under the hard tissue. Damage to the end of the toe causes blood to leak through the nail bed and stain the keratin a dark color. This is also known as a subungual hematoma, or a bruise under the nail.
Diagnosis & Discussion. Calcaneal petechiae (talon noir). Calcaneal petechiae is also called talon noir, or black heel. This condition is caused by pigmentation from extravasated red blood cells and is very similar to a bruise. It is caused by the stress of shearing forces during vigorous athletic activity, especially if repeated jumping or sudden twisting is involved.