How long can you leave a year-old navel piercing empty before it closes?

It is generally not recommended to leave a year-old navel piercing empty for any extended period of time, as it can close or become more difficult to reinsert jewelry without causing damage or discomfort. Leaving a piercing empty can also make the piercing more susceptible to infection or other complications. If the piercing hole has completely closed and you decide to re-pierce it, you should go to a reputable piercing shop to have it done correctly.