2 doctors weighed in:

I have a black line going down my finger nail. What can be the problem.?

2 doctors weighed in
Dr. Heidi Fowler
Psychiatry

In brief: Black line

Black stripes down 1 nail may be subungual hematoma.
Red or brown streaks may be splinter hemorrhages. Brown/black lines from nail plate to tip are often seen in people with dark skin & are normal. Subungual Melanoma can cause nail ridges & dark colors of cuticle. It most often effects the thumbs or big toes. Dark lines may be due to other illnesses. Get checked out when in doubt.

In brief: Black line

Black stripes down 1 nail may be subungual hematoma.
Red or brown streaks may be splinter hemorrhages. Brown/black lines from nail plate to tip are often seen in people with dark skin & are normal. Subungual Melanoma can cause nail ridges & dark colors of cuticle. It most often effects the thumbs or big toes. Dark lines may be due to other illnesses. Get checked out when in doubt.
Dr. Heidi Fowler
Dr. Heidi Fowler
Thank
Dr. Robert Jackson
Dermatology

In brief: Mole

It may be a mole or pigmented streak, but you should see your dermatologist for treatment and evaluation because it could be a melanoma skin cancer.

In brief: Mole

It may be a mole or pigmented streak, but you should see your dermatologist for treatment and evaluation because it could be a melanoma skin cancer.
Dr. Robert Jackson
Dr. Robert Jackson
Thank
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