Why are piercings done with a hollow needle?

Whats hollow needles?

do they pierce you wuth a 20 gauge or 18 gauge

How do they pierce your nose with a needle?Just Curious!

I want my bellybutton pierced but I don't have money to get it done. My friend works in a piercing shop cleaning and stuff so...

Um does anyone on here know where You can get a piercing needle at?? If so Please let me know

do all tattoo parlours pierce ears as well or is just specific ones?..and do helix/cartilage piercings swell a lot after you ...

Hey, I've got 8 piercings and I'm gonna get my 3rd piercing done again. I've gotten all of my ear lobe piercings done with gu...

i want to know because i want some more knowledge on i before i have it done, what kind of needles will be used etc?

I really want to get my nose pierced . But im not sure if I should get it done with a gun or a needle

Where can I get a tongue piercing and probably how much will it cost? Thinking of getting one.