If you have sensitive skin, it's tempting to put your trust in hypoallergenic jewellery or lotions. But the term may not mean what you think: there's no legal definition of "hypoallergenic", so it's entirely possible those products contain something you're allergic to.
According to the FDA, the term "means whatever a particular company wants it to mean." No testing is required, for example, and there's no list of common allergens that has to be left out. Hypoallergenic pets may produce less dander, but it's still possible to be allergic to them.
You're better off checking ingredients (if you know what you're allergic to, and if you're looking at a product with a label) and trusting your own experiences. Read more at the link below for more allergy mythbusting.
Making Sense of Allergies [Sense About Science]