Piercing guns are a blunt force trauma, basically the same as cattle tagging, & works by shoving the sharp piece of jewelry through the tissue, pushing tissue out of its way (versus removing it with a hollow point needle), creating scarring, & avoidable problems that could lead to infection.
Was your lobes once pierced that way? Remove your jewelry & massage the area. Feel that ball? Thats the tissue that had no where to go. (For cartilage-ears, nose-it shatters it)

Piercing guns are also not able to be properly sterilized through an autoclave, as they would melt.

Unless you gain implant grade titanium jewelry and/or they have Mill Certs to prove theirs contains no nickel, you could also potentially encounter infection-like symptoms, due to a metal allergy.

Butterfly backs also harbor bacteria and can also become too taunt (keep in mind 'lil ones are not able to vocalize such). I’ve witnessed them become imbedded more than a few times, sadly. The sharp posts aren’t comfortable. Side sleeping (after healed), depending on length and anatomy, the sharp post has potential to constantly stab/poke. 

Piercers that use such method (guns) are also typically trained by a video and do not understand differing anatomy & how to properly pierce straight, according to such, nor do they typically have their BBP (Blood Bourne Pathogens) to know about/avoid cross contamination. 

I was professionally trained through apprenticeships; in regards to differentiating anatomy, proper angles & placement, proper jewelry & all the knowledge behind such, sterilization, etc... & would love to provide you with not only safe piercings, but safe jewelry, as well. I stand behind my work & take great pride in such. 

*Are you having problems from being pierced by such? No worries! I can help! Send me a text! 814-420-4222