Did you have your IV in for more than a couple days in that same hand? It's not unusual to experience phlebitis if a vein was used for an extended amount of time. For me, anything over two days is asking for it. What it is is basically inflammation in that particular vein. It does not have to be at the insertion site to have been caused by the IV. That's where my money would be. IIRC, you had a C-section, so you may have had that site for a few days. I'm not a doc, so go ahead and call your OB or call the floor and speak to the charge nurse where you were admitted and ask. Sorry! Phlebitis is annoying and it HURTS! In the course of pregnancies/deliveries, I've probably had 200 or so IVs. I was on them for months to stay hydrated with my first two.
Megs
DD1 (13-ish)
DS (11-ish)
DD2 (5-ish)