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Vertical black line under fingernail
A thin (about 1mm) vertical black line appeared under the nail of the index finger (right hand) about a week ago. This line looks like a needle and covers the entire length of the nail. It appeared suddenly and I don't recollect any injuries to the nail (it is painless). Things I have read online (regarding nail melanoma) have scared me. I have attached a couple of pictures. Should I get this checked out and ask for a biopsy? Could this be melanoma?
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