A Reddit user shared a photo of their nail showing a “black line,” and was quickly advised by other users to see a doctor ...

Melanonychia can sometimes be a sign of melanoma (skin cancer). Although a black line on your nails isn't usually a cause for ...

The campaign aims to encourage people to look out for the signs of acral melanoma, which is the most common form of skin cancer in black and brown ... hands or under the nails.