For surgery, any accessory metal of the body like earrings, rings, piercing (e.g vaginal piercing) etc. must be removed from the body to avoid burns. The reason is that during surgery, the surgeons use a device called electrocautery or electro-knife to cut tissues and stop bleeding. If a metal device is present on the skin when being used, the skin can be burned and therefore leave permanent scarring. That's why the OR nurses usually double check in the pre-op area that the patients the patients have no accessory metal in their body. In my practice, I tell the patients to remove their piercing before going to the operating room at the comfort of their home to prevent delays prior surged and minimize the loos of the piercing while in the hospital /surgery center