Why Vertical Nail Ridges Appear and How to Keep Your Nails Healthy
Noticing fine vertical lines running from the base of your fingernails to the tips can be surprising, especially as they become more visible with age. Most people first see these ridges around midlife, often after 40. The good news? In the majority of cases, these lines are a normal part of aging, not a sign of illness. Just like your skin and hair, nails evolve over time—texture shifts, growth patterns adjust, and subtle changes naturally appear. Understanding why these ridges form can help you care for your nails while staying alert to overall health.
What Causes Vertical Nail Ridges?
Vertical ridges, also called longitudinal ridges, stretch from cuticle to tip. Nails are made mostly of keratin, a protein produced in the nail matrix beneath the cuticle. Over time, the consistency of keratin production can change. When layers of keratin build at slightly uneven rates, your nails develop ridges instead of a perfectly smooth surface.
Aging also reduces moisture in nails and surrounding skin, making ridges more noticeable. Dry nails reflect even minor irregularities, so what once went unnoticed may suddenly stand out.
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