Melanonychia, also known as a dark or black line on the nail, causes a streak of dark pigmentation that runs along the nail ...

Have you ever taken off your nail polish only to notice a dark line on the nail running vertically down your finger? These ...

Melanonychia, also known as a dark or black line on the nail, causes a streak of dark pigmentation that runs along the nail bed. It can be a normal color variation, especially in people with ...

While the color of a school bus is the first thing that jumps out at us and causes many to wonder why school buses are yellow, their black lines get a fair amount of attention too. That's because ...

Michelle Tagliamonte, 58, was getting a manicure when she noticed two black lines, which signaled the start of a fast-spreading cancer Kennedy News & Media Michelle Tagliamonte, 58, noticed black ...