When was the last time you looked closely at your fingernails? Not just for polish or a manicure—but really examined them? According to doctors, your fingernails can reveal far more than you think. In particular, ridges on your fingernails—those little lines running vertically or horizontally—may hold clues about what’s going on inside your body.
Let’s dive into what those ridges actually mean, when they’re harmless, and when it might be time to talk to your doctor.
🔍 The Two Main Types of Nail Ridges
Doctors classify fingernail ridges into two primary types:
1. Vertical Ridges (Running from Cuticle to Tip)
These are the most common and typically harmless. Often referred to as longitudinal striations, these ridges tend to become more noticeable with age—a bit like wrinkles on your skin. They’re usually a result of slower cell turnover in the nail bed, which is a natural part of aging.
However, if these vertical ridges appear suddenly or become more prominent, they can sometimes be a sign of:
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Nutrient deficiencies, especially in iron, magnesium, or B vitamins
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Dehydration
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Minor trauma to the nail matrix
2. Horizontal Ridges (Running Across the Nail)
Also called Beau’s lines, these are often more concerning and may indicate an interruption in nail growth due to illness or trauma.
Possible causes include:
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Severe infection or high fever (e.g., after COVID-19, pneumonia, etc.)
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Uncontrolled diabetes
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Zinc deficiency
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Chemotherapy
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Circulatory problems
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Autoimmune diseases
If multiple nails show horizontal ridges at the same time, it’s a strong signal that the body experienced a stress event or underlying health issue.
🩺 When to See a Doctor
While vertical ridges are usually normal, sudden changes in your nail texture or appearance shouldn’t be ignored. Seek medical advice if:
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The ridges are accompanied by discoloration, brittleness, or crumbling
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You notice horizontal ridges on several fingers
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Your nails stop growing or grow very slowly
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You have other symptoms like fatigue, hair thinning, or unusual skin changes
A healthcare provider can help identify any deficiencies or conditions that may be affecting your nail health.
✅ How to Support Healthy Nails
Whether your nail ridges are harmless or hinting at something more, here’s how to keep your nails in top shape:
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