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A member asked:
Hi, i have recently observed a straight vertical black line on the thumb nail of my 9 year old daughter. googling it has spoilt my peace of mind. there are no other issues or injuries. could you please let me know what that black line on the nail is?
A doctor has provided 1 answer
Need eval to know: 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.
Answered 1/27/2021
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