If after a piercing your ear, navel, or tongue starts to itch, redden, or develop small blisters, you’ve likely wondered: is this just healing, or is your body starting to “rebel” against the metal? In reality, reactions to metal in piercings are more common than you might think, and in the vast majority of cases, they pose no threat to your health – it’s enough to recognize the problem in time and replace the jewelry with a biocompatible alternative. In this article, we’ll explore what exactly happens to tissues when they come into contact with nickel, chromium, and other alloy components, why even “hypoallergenic” titanium sometimes causes discomfort, and how to choose jewelry that won’t make itself known even to the most sensitive skin.