The operator will first provide you with medical information as they are required by law to do so. The area on you body will be disinfected and the piercing site will be cleaned with antiseptic to kill any germs and bacteria. You'll wait a few minutes, allowing the the antiseptic to cleanse. Before piercing, the technician must wash their hands thoroughly with soap and water. They will then put on disposable gloves before touching you or the needle.
Piercing guns are only to be used for the ears because they cannot be fully disinfected. A new sterile needle will be used on other areas of the body. After the procedure, the freshly pierced site will be cleaned and new jewelry will be inserted. If you have any allergies to certain metals, be sure to inform the piercer. Avoid using cheap metals and jewelry, they are more likely to cause allergic reactions.