3.Dark Lines Beneath the Nail
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Dark lines or marks under the nails can result from injury, such as catching your finger in a door, causing bleeding beneath the nail. However, if you notice dark streaks without any trauma, it is essential to see a physician immediately, as this can be a sign of skin cancer. Medically termed melanonychia, these dark streaks are particularly worrying if they appear on a single nail. While some lines can be benign and related to medication, pregnancy, or ethnicity, any new or changing line should be examined by a healthcare provider. Subungual melanoma, a type of skin cancer, is the most serious concern. Early detection is vital, so any unexplained dark line—especially one that becomes wider or darker—should be assessed promptly.
