As we age, our bodies change in quiet, sometimes curious ways—and one of the more subtle signs often shows up right at our fingertips. If you’ve noticed vertical lines running from the base to the tip of your nails, you’re not alone. Known as longitudinal ridges, these faint striations become more visible with age, especially after 40, and in most cases, they’re completely normal.
Why Do Vertical Nail Ridges Appear?
The most common culprit is a natural slowdown in keratin production—the structural protein responsible for strong, smooth nails. As keratin levels decline with age, the nail surface can become uneven, resulting in those familiar ridges.
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