Faint black or brown streaks on nails are often harmless, but scientific evidence shows they may sometimes signal subungual ...

Soccer superstar Cristiano Ronaldo (40) was spotted again with black paint on his toenails. Ronaldo recently released a photo of himself with his son Cristiano Jr., 14, on his Instagram account, ...

Portugal and Al-Nassr superstar Cristiano Ronaldo has been spotted wearing black nail polish in several images, but he does so for sporting reasons.

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 ...