[Coldsteel24]

I've searched for anything to do with metal plates/pins/screws and allergies related to them, and found nothing, if I missed something, I'll knock out 50. If I'm out of line posting this question, I'll apologize if necessary. On to the question:
My wife broke her right ankle last year, and they placed titanium screws and a plate in her ankle to support the bones as they healed. shortly after, she started getting a strange skin rash localized to the surgery that resembles chicken pox, rather small sores that itch and don't seem to go away no matter what she tries. My question is has any of you ever heard of this before, could it be an allergy to the metal? I'm guessing the screws and plate aren't 100% titanium as it is a soft metal, and I'm guessing its an alloy. The only known allergies she has are to Sulfa drugs. Any help would be greatly appreciated.