Keloids often form due to the blunt force used by ear piercing guns. Tattoo guns would be unlikely to cause keloids because they just use a needle to distribute the ink in the skin. So, to answer your question, I've never heard of a tattoo gun causing keloids. If you're still unsure, ask your local tattoo parlor and they can give you any information you want to know about tattoos.
none.
nope none
He had none
None.
none of them
Nope, none that we know about at least.
none
None!
No. Bill and Tom both have piercings and Gustav is rumored to have had one previously but Georg has none.
The tattoo that was showed in season 1 of OTH was fake. Now she has 2 Tattoos. One on her arm and one at the inside of her foot.
none, wait till you're older.
None, she doesn't have one.