Allergic to titanium earrings?

ch

My daughter got her ears pierced for her 6th birthday yesterday. She has a rash behind her ears. Is she allergic to her earrings they are titanium? I called the place that did it they said because it is so fresh keep an eye on it to see if it gets worse. And I called her pediatrician who just said to put antibiotic ointment on it but if it looks worse tomorrow we will go to a walk in clinic.