I always thought my "hives" aka really itchy skin was from stress. I've now linked it to 2 different birth control pills and the NuvaRing. The first week, I was fine, but steadily my skin got worse and worse. There was NO visible rash, my skin just itched, and I could not sleep for a week. I gave up and removed the NuvaRing, a week later, I'm back to normal. This reaction to birth control did not start for me until my 20s. Beware.