Red bumps. Help!

Lys

So, it's been about a week since I got surgery done in my abdominal area, I had a mass the size of a volleyball taken out (formed due to a condition I have) and they took my appendix out as well. I'm still in a lot of pain. They have me taking Percs and Zofran. Just recently I started getting very itchy and have little bumps on my thighs and on my stomach. They itch like crazy. It's not a reaction to my meds. Has anyone had this happen to them after surgery? What did you do to stop it? I'm going crazy!