As a word of advice: never use an ear piercing gun.
They are blunt instruments which end up damaging the flesh and producing more pain than is necessary.
When I got my ears pierced years ago, I went to a tattoo parlor. It was extremely sterile, with the needles in sterilized packaging and the piercer wearing gloves. Because of how sharp the needles were, all I felt was a small pinch in each ear and that’s pretty much it. They never hurt again and healed beautifully.
By comparison, ear piercing guns are barbaric. People get their ears pierced by these guns and then suffer through pain, inflammation, and in some cases, ear deformation.