Hello! I'm so sorry to hear about the allergic reaction you've had. We've tested our products thoroughly over the last four and a half years of our business, and we have a nickel-free guarantee on all of our jewelry. We specialize in pure high grade 316L stainless steel coated in real 18 karat gold plating, and we are very proud of the quality we offer by never using nickel, brass, copper, or any other lower quality materials. Unfortunately, while not common, allergic reactions to different metals do occur from time to time, especially if there is a hypersensitivity or chipping on the piece. With over a quarter million customers worldwide, we've heard of an allergic reaction only a handful of times. We would absolutely love to replace the item for you, in case this is a scenario of a defective material, or if you'd like to get something else entirely, please email us at support@nominalx.com and we would love to take care of you. Thanks so much!