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Dr. Mark
Dr. Mark, Doctor (MD)
Category: Health
Satisfied Customers: 11946
Experience:  U.S. Physician/Surgeon in Neurosurgery
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Does a lost finger nail grow back and how does it take

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Does a lost finger nail grow back and how long does it take
Generally, if the nail bed is still intact, the fingernail will grow back, though slowly, at about 1mm per week.

This means it may take 3-4 months before the nail is back to it's normal length.
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