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.
The real cause for concern about tarnish is what it can hide and the damage people can unintentionally inflict when trying to prevent it in the first place. Tarnish can hide genuine damage, such as scratches, pits and corrosion. A nice dark coating of tarnish can hide many flaws.