When Should You Worry?
Vertical ridges are usually harmless, but you should seek medical attention if you notice:
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Changes in nail color (especially dark streaks or lines)
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Splitting, peeling, or thickening nails
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Pain, swelling, or inflammation around the nail
These may point to fungal infections, trauma, or—in rare cases—melanoma, a serious form of skin cancer that can appear under the nail.
