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For any cuts, use an antibiotic ointment (such as Polysporin). . . . How long does it take to heal a hurt finger? Breaks in the bones of the finger usually heal well in about 3 to 4 weeks. . Medical Treatment If there is blood under the affected fingernail and pain has increased, call your doctor. How to drain a smashed fingernail. . . 6 Draining the blood from the.
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