What are dark lines in my finger nails?

Pigment. Thisispigment from a mole qt base of nail. If there're multiple this is family charcteristic. However if there is only one it coukd rarely be a sign of a melanoma under the nail. That diagnosis requires a biopsy.

Related Questions

What are dark lines in my finger nails?

DARK LINES NAILS. In light-skinned people, dark lines can be due to medications, or depending how long it has been there, and on how many nails are involved, could be a rather serious tumor called melanoma. If you are dark-skinned, it could be a normal process, probably inherited. Your best bet is to see a dermatologist if this is new & something that has been worrying you. Read more...