What Are Vertical Ridges on Fingernails?
Vertical ridges are raised lines that travel in the same direction your fingernail grows—from the cuticle toward the fingertip.
Some people have only a few faint lines, while others develop several noticeable ridges across multiple nails.
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They are different from horizontal grooves, which run from side to side across the nail.
That distinction matters because horizontal grooves, sometimes
called Beau’s lines, can occur when nail growth has temporarily been interrupted by illness, injury, severe stress, certain treatments, or other medical conditions.
