Those Vertical Lines on Your Nails After 40? Here’s What Your Body May Be Trying to Tell You

If you’ve started noticing thin vertical lines running from the base of your fingernails to the tip as you get older, you’re far from alone. For many people, these changes become more visible after the age of 40. In most cases, vertical nail ridges are completely harmless and simply part of the natural aging process. However, in certain situations, they can provide subtle clues about your overall health.

Understanding what causes these ridges—and knowing when they deserve closer attention—can help you care for your nails more effectively and recognize possible warning signs early.

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What Are Vertical Nail Ridges?
Vertical nail ridges, medically known as longitudinal striations, are raised or indented lines that run lengthwise from the cuticle to the free edge of the nail. They can appear on one nail or all nails and may range from barely noticeable to clearly pronounced.