The blood trapped beneath the nail causes it to turn black or dark in color as it dries and clots. This article will review black toenail symptoms, potential complications, treatment options, ...

The sides of the nail curve in, pinching the surrounding skin. A pincer toenail causes the skin to become red, tender, and swollen. It also raises the risk of infection. Common causes of pincer ...

creating a dark purple or black discoloration (medically known as a subungual hematoma). This adds pressure and can eventually cause the nail to fall off. Other symptoms of trauma-induced toenail ...