Seeing faint vertical lines that run from the base of your fingernails to the tips can catch your attention, especially if they seem more noticeable over time. For many adults, these ridges begin to appear or deepen after the age of 40. In most cases, they are a normal part of the aging process rather than a sign of illness. Just as hair and skin change gradually over the years, nails also reflect shifts in the body’s natural rhythms.
These lines, often called longitudinal ridges, follow the length of the nail from cuticle to edge. Fingernails are made primarily of keratin, a structural protein produced by cells in the nail matrix beneath the cuticle. When cell production is steady and well-hydrated, nails tend to grow smoothly. As the body matures, however, this process may slow slightly, leading to subtle variations in keratin layers that appear as raised lines.
Dryness can make these ridges more pronounced. With age, nails may hold less moisture, and frequent handwashing, sanitizer use, or exposure to cleaning products can further reduce natural oils. In some cases, lifestyle factors such as hydration, diet, and overall circulation may influence nail texture. While mild nutritional imbalances can sometimes affect nail appearance, vertical ridges alone are usually not a cause for concern.
If nail changes appear suddenly, worsen quickly, or are accompanied by other unusual symptoms, it is wise to consult a healthcare professional for evaluation. Otherwise, gentle care is often enough. Regularly moisturizing nails and cuticles, wearing gloves during household tasks, filing carefully to prevent splitting, and maintaining a balanced diet can support healthy nail growth. For most individuals, vertical ridges are simply another natural sign of aging—subtle, common, and manageable with thoughtful self-care.
