If you have these lines on your nails after 40, it is a clear sign that.. | June 24, 2025

Have you spotted thin vertical lines appearing on the base to the tip of your fingernails as you’ve gotten older? If so, you’re not alone. Many people start to consider these changes after the age of 40, and while they’re usually harmless, they can sometimes symptoms underlying health problems. So, what causes these vertical ridges, and when should you be warn:ed?

Understanding Vertical Nail Ridges
Vertical ridges on the nails — also considered as longitudinal striations — are raised lines that run from the cuticle to the tip of the nail. These ridges can vary in depth and number and are often more visible as we age.

For most people, these ridges are a normal part of aging. Just like skin removes elasticity and hair turns gray, nails also deal with structural changes over time. The production of keratin — the protein that forms nails — may slow down or become uneven, leading to changes in nail texture.

Main Causes After Age 40
Natural Aging Process
The most popular reason for vertical ridges is simply getting older. As we age, the body’s ability to change skin cells slows down. This also affects nail matrix cells (the base of the nail), causing them to produce keratin unevenly, resulting in ridges.

Dehydration of the Nail
Aging skin tends to be drier, and the same goes for nails. A lack of moisture can make the nail plate more brittle and emphasize any natural ridges. Regular exposure to water, soap, and cleaning chemicals can deteriorate this dryness.

Nutritional Deficiencies
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