Rather, they have most likely caused a joint, bone, ligament or tendon injury due to overstraining, pinched nerve, or similar causes. While heart attack warning is usually connected with the pain in a woman's left arm, the right one, if hurting, is probably injured. The cause may be a simple night of sleeping while holding your right arm in an unnatural position.
As brass hardware ages, its surface oxidizes, which leaves a layer of tarnish over the hardware. Over time, an additional protective layer, called a patina, forms over the untreated tarnished brass.
Originally Answered: Why do bronze and brass turn green? The green layer you see is called tarnish and forms when brass is exposed to the carbon and sulfur dioxides in the air. It's basically a thin layer of corrosion that forms and it can only be eliminated with a thorough cleaning which requires you to remove some of the surface and patina of the piece.