She immediately told her customer that the dark line was likely a symptom of melanoma. Subungual melanoma (aka nail melanoma) is, as its nickname suggests, a skin cancer that occurs under the nail.

When doctors examine patients, they often look beyond the presenting symptoms to gather additional diagnostic information.

While skin cancer occurs less frequently in people with dark skin (accounting for only ... Watch for changing moles or unusual spots, especially under nails or between toes. Apply broad-spectrum ...

Black or dark brown streaks under the nails should never be ignored, as they could indicate melanoma, a dangerous type of skin cancer. While some harmless conditions may also cause nail ...

It can also occur in the nail and appear as a wide, dark streak on the nail ... a healthcare professional will collect a skin sample and send it for examination under a microscope.