Have you noticed “thin vertical lines appearing on the base to the tip of your fingernails as you’ve gotten older”? Many people see these changes after 40. While often harmless, they can sometimes indicate health issues.

Understanding Vertical Nail Ridges
Vertical ridges, or longitudinal striations, are raised lines running from cuticle to tip. “For most people, these ridges are a normal part of aging.” Keratin production may slow or become uneven, changing nail texture over time.

Common Causes
Aging naturally slows cell renewal, affecting the nail matrix. Dry nails worsen ridges, as “a lack of moisture can make the nail plate more brittle.” Nutrient deficiencies—biotin, iron, zinc, magnesium—also contribute. Occasionally, ridges may signal conditions like poor circulation, thyroid imbalance, or arthritis.

Warning Signs
Pay attention if ridges come with “changes in nail color (especially dark lines or streaks), nail splitting, peeling, or thickening,” or pain and swelling. These may indicate fungal infections, trauma, or rarely, melanoma.

Care Tips
Moisturize nails, stay hydrated, and eat nutrient-rich foods. Use gentle nail tools, avoid harsh manicures, and consider biotin supplements after consulting a doctor. These steps help reduce ridges and maintain healthy nails.