What Causes Those Black Lines on Nails? Experts Explain
These black lines on fingernails may look like bruising or internal coloring - not like you just accidentally created an edgy ...
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What Causes a Black Line on Your Nail (Melanonychia)?
A black line on your nail (medically known as melanonychia) causes a streak of dark pigmentation that runs along the nail bed ...
Ohio Mom Discovers Cancer Deep in Her Thumb — and the Only Sign Was 2 Thin Lines on Her Nail
Michelle Tagliamonte, 58, was getting a manicure when she noticed the black lines on her thumb, which signaled the start of a fast-spreading cancer.