A black line on your nail (medically known as melanonychia) causes a streak of dark pigmentation that runs along the nail bed. It can be a normal color variation, especially in people with darker skin ...

Not all marks on your nails are cause for alarm. "A black line that extends longitudinally from the cuticle to the free edge of the nail is often pigment," board-certified dermatologist Joshua ...

Your nails do much more than complete your look — they can offer valuable clues about what’s going on inside your body. Paying attention to these signs can help you spot potential problems early and ...

A woman had a line on her nail that looked like a splinter, which was an aggressive skin cancer. Charmaine Sherlock didn't think that such a small mark could be as dangerous as melanoma. Sherlock told ...

Karolina Jasko has a family history of melanoma, so she's no stranger to paying attention to her skin. Her mother — who battled the deadliest form of skin cancer twice and recovered — has always been ...