Horizontal Ridges: A Possible Warning Sign
Horizontal ridges (also called Beau’s lines) deserve more attention. These ridges run side to side across the nail and can indicate that something interrupted nail growth. Possible causes include:
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A recent illness, infection, or surgery
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Uncontrolled diabetes
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Circulatory or heart problems
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Side effects from certain medications
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Malnutrition or vitamin deficiencies
If you notice deep horizontal ridges—especially if they appear suddenly or affect multiple nails—it’s wise to consult a doctor. They may want to check for underlying health conditions.
