About a week ago I had started to get these strange bumps on my arms, they looked like small bug bites but they didn't itch. Then yesterday I took off my shirt and saw that these same type of dots are on my chest. There not filled with any puss and they don't itch, and today, i noticed the same bumps on my upper thighs and groin, along with my back. I have no idea what is happening, and I havent changed anything in my diet, I haven't gone anywhere and things haven't changed at all from before this was happening.as far as I know I'm not allergic to anything but I have psoriasis if that helps. I'm 16 and I don't know whats happening, my mom thought it could be a heat rash but I don't know