When you get a new piercing, which should always be done by a professional piercer, you will be given a temporary piece of jewelry to keep in while the piercing heals. This will take several weeks or so, depending on where you got the piercing. After that you will probably be given a second piece, used to test if you have any allergic reactions to jewelry. If this is okay for a week or two then you’ll be cleared and able to wear all the metal jewelry and plastic tongue rings you want.
To start with, you always want to have the piercing done by a professional piercer, using sterile equipment. Feel free to ask if you have any doubts as to how they keep their equipment clean. Once it’s done, it will probably hurt, but the pain should go away over the next few days or so. If it doesn’t go away in a week, or actually gets worse, you may want to look for symptoms of infection, like swelling or pus appearance around the jewelry.
After the piercing has completely healed, your piercer is probably going to want to put some kind of non-allergenic piece, like sterling silver, in for a week or two, to make sure your body doesn’t have any reactions to new jewelry. It’s somewhat rare, but can cause serious side effects, so it’s important to test for this. Like with infections, look for swelling or pain as signs that you are having a reaction.
Once you’re given the okay, you’re set to wear all the belly button rings and tongue rings that you want. Pain is a sign that something is wrong, and expect for the initial piercing and a few days after, your piercing should not hurt. If it does, or it’s accompanied by any of the listed symptoms of infection, call a doctor or your piercer right away.