Most of the time, even if the nipple is healed and you’ve had the piercing for years, the hole will close up — fast. There are exceptions, of course, and some holes stay open for years without jewelry, but it’s pretty uncommon.
Also know, how long does it take for a nipple piercing to stop hurting?
Managing the Pain
It’ll typically be sore for a week after the piercing. You may also bleed, itch, or see swelling or discharge from the wound. Your nipple may feel sore or irritated as it heals over the next few months.