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Horizontal lines (Beau’s lines): These can suggest past illness, significant stress, or chronic conditions such as diabetes or circulation issues.
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Vertical ridges: While common with aging, unusually deep or uneven ridges could point to nutritional deficiencies like iron or vitamin B12 shortage.
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Dark streaks: Sudden appearance of dark streaks may signal melanoma, a serious skin cancer, and require immediate medical attention.
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White lines (Muehrcke’s lines): These may be linked to liver or kidney problems, or low protein levels.
Bottom line: After age 40, changes in your nails—especially unusual lines—should not be ignored. They can be an early warning from your body, so it’s important to consult a healthcare provider if you notice anything unusual. Your nails might be revealing health issues before other symptoms appear.
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