I am not sure what these bumps are because they did not itch at first, but they did later on yesterday night. I have had them since yesterday around 7:30 pm central time. They are not fluid filled, dry, or blistering. They look exactly like bug bites. I know they aren't bug bites because when I get bug bites they swell up bad and I immediately start to itch. They started off on my left arm then by then end of yesterday night they were on my right arm too and my right shoulder. Today I found one on my lower back and now some on my leg, but they look more like a razor burn rash. What could this be?