Body Piercing May Be Aggravating Allergies to Nickelhttp://articles.mercola.com/sites/articles/archive/2008/01/02/body-piercing-part-three.aspxBody piercing is probably causing a steep rise in allergies to nickel across the Western world. Nickel is already the most common cause of contact allergy in several European countries. And exposure to the metal can cause lifelong sensitivity. SensitizedenCommunityServer 2008.5 SP1 (Build: 31106.3070)