If You Have These Lines on Your Nails, It’s a Clear Sign
Your nails can tell you more about your health than you might think. While we often notice things like chipped polish or hangnails, subtle changes—like the appearance of lines—can actually be signs of something deeper going on inside your body. If you have visible lines on your nails, especially if they’ve appeared recently or changed in appearance, it’s worth paying attention.
There are several types of lines that can show up on your nails, and each could point to a different cause:
1. Beau’s Lines
These are horizontal grooves or indentations that run across the nail. They often occur when nail growth is interrupted due to physical or emotional stress, serious illness, or trauma. Conditions like high fever (from illnesses such as COVID-19 or pneumonia), uncontrolled diabetes, or even chemotherapy can trigger these lines. If Beau’s lines are present on multiple nails, it’s a strong sign that your body has gone through a systemic shock.
2. Vertical Ridges
These lines run from the base of the nail to the tip and are usually harmless. They’re often associated with aging, as the body produces less natural oil and moisture. However, if they become more pronounced or are accompanied by other changes—such as thinning nails or discoloration—it could be a sign of nutritional deficiencies, particularly a lack of iron, magnesium, or vitamin B12.
3. Muehrcke’s Lines
These are paired white lines that run horizontally across the nail bed and don’t move as your nail grows. They can indicate low levels of protein in the blood, often due to liver or kidney issues, or from severe malnutrition. If you press on the nail and the lines fade, they’re likely Muehrcke’s lines—and should prompt a visit to your doctor.
4. Dark or Black Lines (Melanonychia)
If you notice dark, vertical stripes—especially a single one—it could be something more serious. While sometimes harmless in darker-skinned individuals, a new, dark stripe may indicate melanoma, a dangerous form of skin cancer. It’s especially concerning if the line widens, darkens, or the surrounding skin becomes discolored.
Bottom Line:
Your nails are a window to your health. While not every line is cause for alarm, new or unusual markings should never be ignored. If you’re unsure, it’s best to consult a healthcare provider for a professional evaluation. Your nails might be trying to tell you something important—make sure you’re listening.