Well you need to see your piercer, there is a tool for holding the shaft on the dermal that needs to be used in order to change the top. So it's off to your professional body piercer.
no
The Body
Its a permanent piercing. This is what they call the jewelry.
A dermal anchor is not a piercing, but in fact a body modification. Now as for changing the top portion of the dermal anchor, the top must be unscrewed and the new top screwed into the anchor shaft. Dermal anchors always have interchangeable screw threads. There is a type of surface piercing without interchangeable attachments known as a Skin Diver. Removal of a dermal anchor must be done by a licensed medical practitioner in North America and most places in the E.U. removal by a body piercer is in fact practicing medicine without a license and is illegal.
You'll have to get a piercer to check it out. If its sever scarring, they may not be able to insert the dermal. Piercing scare tissue can be pretty painful as well. Just get it checked out!
Contact a local piercing studio they will tell you what the age requirements are for your area.
It sounds to me like your talking about a dermal or a horizontal navel piercing which is a surface piercing. But from the sound of it it's a dermal piercing because I've never seen a surface piercing with 3 balls unless there 3 different piercing in a row. I could help you more if I saw a picture of what your talking about.
I went to my piercer to get mine changed, and it hurt like heck. Probably as much, if not more, than when I pierced it.
It can be pierced anywhere you want
Yes, you can change your piercing after 6 months, as long as you know your piercing is healed, and it doesn't seem infected. you can safely change the piercing after 6-8 weeks. Just make sure after you change it you sterilize it. Just a tip, when your changing it use water to lubricate it so it slides out easier.
No absolutely not. It could get seriously infected and reject, leaving you with scarring.
Puncture to the finger tips