My 15 y.o. daughter started having sudden clusters of itchy bumps on her left arm yesterday morning. Since that time, there have been random spots on her upper back, a few on her lower back, legs, neck, and face. I took her to her primary care physician yesterday and they had no idea what it was. She even broke out in 5 new spots just while we were sitting in the dr. s office! They have referred us to a dermatologist, but that apt is not until next week. We ruled out flea bites, bed bugs, and other insect bites. The randomness is what is causing us to scratch our heads.