A member asked:

One of my foot's finger (middle, left feet)... has a brown/dark lines vertically (becomes lighter lately), is it caused by fracture? or tumor/cancer?

A doctor has provided 1 answer

Not likley: While dark lines under the nail can be a manifestation of melanoma, mostly these are harmless. See this site for more info and pictures. http://www.nhs.uk/conditions/nail-abnormalities/pages/introduction.aspx.

Answered 2/7/2015

5.1k views

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