Have you noticed thin vertical lines running from the base to the tip of your fingernails? If you’re over 40, you’re not alone. These changes are common with age and often harmless—but they can sometimes signal something more serious. It’s worth paying attention to what your nails might be saying about your health.

Vertical ridges on nails can have several causes. In many cases, they appear simply due to aging or dehydration of the nail matrix. As we age, the body produces less natural oil, which can affect the texture of our nails—making these lines more visible.

However, in some cases, these ridges could be a sign of nutritional deficiencies. Low levels of iron, vitamin B12, or magnesium may lead to visible changes in nail texture. If your diet has been lacking or you’ve had digestive issues, this could be the culprit.

In more concerning cases, vertical ridges may point to underlying health conditions such as thyroid disorders, rheumatoid arthritis, or circulation issues. If you notice sudden changes, worsening ridges, or other symptoms alongside them, it’s best to consult a healthcare provider to rule out any serious problems.