While in the 1st month on the NuvaRing, I experienced small bumps on my stomach area (bellow breast & above the belly button). I thought it was heat rash. However, while in the 2nd month on the NuvaRing, I experienced sunburn/welting hives (range from 1/2 to 4 inches) all over my body, swollen fingers/hands, swollen lips, swollen left side of my face (including eyes), heartburn feeling in my chest. This landed me in the ER because I had a hard time breathing. The ER doctor immediately administered Diphenhydramine (Benadryl) via an IV. I was also given Prednisone (steroids) Famotidine (Pepcid). The next day--I still have hives that pop up of I don't take the Diphenhydramine & Prednisone pills on schedule. The chemical/NuvaRing has to get out of my system!!! Beware Ladies!!!