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.
Sterling Silver tarnishes much more easily due to the copper content because copper oxidizes easily. In addition to surface tarnish when heated to soldering temperatures sterling silver becomes permeable to oxygen which may allow the copper in the alloy to oxidize in the interior resulting in firescale or firestain.