When Maria Delgado noticed a dark streak under her big toenail, she assumed it was from dropping her gym bag on her foot. Six months later, that seemingly innocent mark led to a diagnosis that ...

purple or black. The most frequent reason for discoloured toenails is nail fungus, which is challenging to treat but rarely a serious source of discomfort and common causes of yellow toenails ...

The nail plate and proximal nail fold of the right great toe subungual hematoma appear as a purple-black discoloration in contrast to the normal-appearing left great toenail. Closer views of the ...