4 doctors weighed in:
I have a strange not straight lines in my nails.They are black and usualy start in the midle of the nail.Not all the fingers have it at same time.?
4 doctors weighed in

Dr. Morris Westfried
Dermatology
3 doctors agree
In brief: Trauma?
Black lines run the full length of the nail.
Multiple lines are normal and are seen more commonly in african americans. An isolated black line is a nevis or. Ole which may represent a melanoma. An isolated black line needs to be biopsied.

In brief: Trauma?
Black lines run the full length of the nail.
Multiple lines are normal and are seen more commonly in african americans. An isolated black line is a nevis or. Ole which may represent a melanoma. An isolated black line needs to be biopsied.
Dr. Morris Westfried
Dr. Morris Westfried
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