Have you noticed lines running from the base to the tip of your nails? You’re not imagining it. As the article explains, “These lines, often more noticeable with age, are commonly referred to as vertical nail ridges.” They are especially common after age 40 and often raise concerns about health.

In most cases, there’s no cause for alarm. “The good news is that in most cases, vertical nail ridges are harmless.” Medically known as longitudinal striations, they are raised lines that follow the natural direction of nail growth and can range from barely visible to easy to feel.

Aging is the most common reason they appear. “Just as skin wrinkles and hair changes color over time, nails also undergo structural changes.” As keratin-producing cells slow down or grow unevenly, nail texture changes naturally. Dryness can make these ridges more noticeable, especially with frequent handwashing or exposure to soaps and cleaning products.

Nutrition and overall health may also influence nail appearance. Low levels of biotin, iron, zinc, or magnesium can weaken nails. In rarer situations, vertical ridges may be associated with conditions such as poor circulation, thyroid disorders, arthritis, eczema, or psoriasis, particularly if other symptoms are present.

Some warning signs should never be ignored. “Dark streaks beneath the nail, splitting or thickening nails, or redness and pain around the nail bed” may point to infection or more serious conditions. Moisturizing regularly, staying hydrated, eating a nutrient-rich diet, and practicing gentle nail care can help maintain healthy nails. While vertical ridges are usually a normal part of aging, sudden or concerning changes should always be evaluated by a healthcare professional.