Noticing thin vertical lines running from the base of your fingernails toward the tips can feel surprising, especially when they become more noticeable with age. Many people begin to see these changes after midlife, and in most cases they are entirely normal. Vertical nail lines are usually linked to natural aging rather than a health concern. Just as skin texture and hair change over time, nails also reflect the body’s gradual shifts. Understanding why these lines appear can help you care for your nails with confidence.
Vertical ridges, often called longitudinal ridges, run from the cuticle to the edge of the nail. Fingernails are made of keratin, a protein produced in the nail matrix beneath the cuticle. As the body ages, the growth process can slow slightly, leading to subtle variations in how keratin layers form. This uneven growth can appear as ridges on the nail surface. Reduced moisture retention over time can also make these lines more visible, especially with frequent handwashing or exposure to drying products.
Additional factors can influence how pronounced vertical ridges appear. Mild nutritional imbalances, changes in circulation, or normal hormonal shifts that occur with aging may affect nail growth and texture. Because nails rely on steady blood flow and nutrients, even small changes can show up over time. While these ridges are typically harmless, sudden or dramatic nail changes, especially when paired with other symptoms, may warrant professional attention.
Maintaining nail health as you age is usually simple and preventative. Regularly moisturizing hands and cuticles helps reduce dryness and smooth the nail surface. Wearing gloves during household tasks protects nails from excess moisture and chemicals, while gentle filing helps prevent splitting. Staying hydrated and following a balanced diet also support healthy nail growth. Although vertical lines are most often a normal part of aging, paying attention to your nails can offer helpful insight into overall wellness.