To help us understand what those thin black lines on nails are and how to treat them, we turned to pros. Keep reading for ...

Michelle Tagliamonte, 58, noticed black lines on her thumb while getting a manicure in September 2024 The Ohio mom of two said when the line didn't grow out, she saw a dermatologist, who diagnosed her ...

Michelle Tagliamonte, 58, was getting a manicure when she noticed two black lines, which signaled the start of a fast-spreading cancer Cara Lynn Shultz is a writer-reporter at PEOPLE. Her work has ...