Hi ! I get that same rash! It's a pain in the butt but usually clears up and then my hands peel about a week later. I saw a derm and they said it looked like eczema in the palms. Please do report this symptom to the pharmacist that supplies your IVIG. I think this is one of the lesser known side effects, and it took me 4 months to pinpoint it's origins. the more reports of it the more likely they will be to tell others about the possibility. Recently I've started getting them behind my ears, and getting large red bumps on my upper body. They look like big angry pimples before they get white, but there's nothing in them. I'm changing my brand so hopefully it will stop. My nuero thinks I may be becoming more allergic to something in the preparation (preservative)? I think the chest pain is something you should take very seriously! I hope your doing well and this finds you strong!
Jessica