In our experience, we have found that earpiercing guns are not sterile. Most people who use these devices wipe them off with bleach or alcohol after each use and call it good. We feel that all piercings must be performed with a sterile piercing needle that is disposed of after one use in a sharps container. After a loud startling bang, a dull stud rips through the tissue. It is significantly less painful to have the piercing done with a piercing needle that is extremely sharp and glides through the tissue without any resistance.
Ear piercing guns are inaccurate.
The inaccuracy of piercing guns can be disastrous in piercings such as the nipple or navel where improper placement will result in scarring, the body's rejection of jewelry, or even worse, the tissue swelling because of the jagged tear of the piercing stud. The result,the swollen tissue engulfs the jewelry at that time is extremely painful and sometimes requires surgery. Ear piercing studs are terribly inappropriate for new piercings. They are most commonly made of very low quality metals,thus causing many piercees' allergic reactions. Most studs lack a long enough post to allow for swelling, so oxygen and circulation to the area are limited.