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. A tight fitting stud is also a danger in that it doesn't allow the body to discharge fluids and bacteria will become trapped inside the piercing thus causing infection. It can be very difficult to work any kind of cleaning solutions into such a tight opening. This is especially apparent when ear piercing studs are used to pierce ear cartilage or the nostril.