A member asked:

Overnight, i have a black vertical line from cuticle to edge of my right little finger nail. very thin-around 0.5-1 mm wide. no trauma. what is it?

A doctor has provided 1 answer
Dr. Oscar Novick answered

Specializes in Pediatrics

Beau's lines: The black line is known as beaus. Lines and usually appears as a sign of illness or trauma to nail.

Answered 8/27/2019

4.7k views

Thank

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