All metals (even precious metals such as gold, silver and platinum) comprise nickel, at least as a dopant.
Nickel is a material that causes allergy. Therefore, we propose earrings for ear piercing made from medical plastic, with zero (0%) content of nickel, so that it eliminated the possibility of developing an allergy to nickel.
Earrings made of medical plastic are particularly recommended for children and adults who want to be absolutely sure, that during the healing period, they do not develop an allergic reaction to nickel.