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By definition, your toenails, as well as your hair, and as opposed to your skin - is always dead.

What happens if it gets black is that you've had a bleed under the nail, in the nail bed.

That kind of thing will often - but not always - disturb the growth zone of the nail somewhere behing the cuticle.

When that happens, the nail will no longer be able to grow as a continuous unit. There'll be a stop in the growth, a break in the nail, and then there'll be a new nail. As the new nail grows the old will be pushed ahead and eventually fall off.

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12y ago

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