and gold itself is about as harmless as a material can be as it is nonreactive unlike most metals. if someone is reacting to a gold filling its likely the copper or other materials in the alloy. and a filling in a mouth is a long way from a material on the skin as you would be swallowing whatever is coming off the filling there for ingesting.....and once again no one is planning on eating teh clothing though as far as heavy metals go silver is pretty nontoxic and i doubt there is enough in a piece of clothing to do anything if you did eat it.
