Good news! Here is an article on nail problems and injuries that contains the following statement, along with a lot of other great information:
from the nail bed. Once your nail separates from its nail bed, for whatever
reason, it will not reattach. Nails grow back slowly. It takes about 6 months
for fingernails and up to 18 months for toenails to grow back attached to the
Usually, but you had quite a crush injury. The body has a remarkable ability to re-grow a lost or damaged nail assuming the matrix (the base of the nail that has the cells needed to regenerate the nail) has not been damaged. A damaged matrix may cause the nail to grow back somewhat deformed or have a ridge. When we lose a finger, we do not grow a new one, but when we lose a nail, the body likes to replace it. Time will tell if your nail re-grows again, and comes in normally.
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