They don't make for the prettiest of manicures, but are they something more than a cosmetic problem? Here's what a ...

Longitudinal ridges on one or two nails can be due to trauma to the nail plate. However, this is unlikely to be the cause if all your nails are affected! It's also very unlikely to be due to a ...

Michelle Tagliamonte, 58, was getting a manicure when she noticed the black lines on her thumb, which signaled the start of a fast-spreading cancer.