It can be safe.
A "safe" piercing comes from going to a reputable shop (skilled piercing artists, clean studio, clean needles, clean and safe jewelry) and performing proper aftercare (which any reputable shop will inform you of).
An "unsafe" piercing comes from getting it done anywhere that isn't a reputable shop. This means using hypodermic needles from farm supply stores, using safety pins, the person performing the piercing has no formal training, the person performing the piercing doesn't have a sterile room for the work to be done at, any equipment that isn't factory sealed and sterile. Generally you will not get proper aftercare information, nor treatment from a "garage piercer".
Though - an unsafe piercing can also come from yourself not taking proper aftercare measures, even if you get it done in a shop.
At a clean and reputable tattoo and piercing studio.
A belly piercing is a piercing on the belly button. Where your belly button might go in or out, it is the slight arch you get just above it. it is a piercing through that area. depending on how your belly button is formed. Search google for images.
The pain of the belly button piercing should subside after a week.
Its the jewelry that goes into a belly button piercing.
Yes you still can.
if everything is clean and you know what your doing , yes if not leave it to the pros
A belly button ring is a body piercing placed in a cauterized area of the belly button.
You should have no problem with a belly ring. The piercing goes through the skin on your stomach, not your abdominal muscles. Your abs protect your insides, they'll be safe from your piercing.
Your belly button piercing hurts more then a normal ear piercing your belly button piercing is more sensitive then a ear. :]
Belly button.
A lip piercing hurts more than a belly button piercing, but neither hurt much at all. Getting your lip feels like you accidentally bit it haha and you can barely feel a belly button piercing.
Bill has a setum piercing but there are rumors about a belly button one.