I had to stop using the libre because of an allergic reaction to the sensors (which also made them hopelessly inaccurate). My dexcom sensors occasionally feel itchy, but I've kept things under control with cavillon cream. The itchiness (from the overpatch) was really bad for a few days but has now subsided.. I'll probably use some under the overpatch next time). So itchiness is hopefully more of an issue for me than for other people.I've had no problems with itchiness.