Fungal infection Melanonychia Melanoma 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 ...

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.

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 ...

Dark spots on the skin are usually not a cause for concern, but some people may choose to get rid of them for cosmetic reasons through laser treatment, microdermabrasion, and other methods.