My mom has developed a rash on her torso within the past few hours. It covers her entire torso and its like little raised bumps that are set very close together. It does not itch, yet... But also she had angioplasty two days ago. Could this be a reaction to the dye or to the plastic kind of sticker they used to close the entry point of the cath? She had used benedryll. Should we just wait it out?