Hi, I'm female and 18. I have red bumps on my back, abdomen, neck, and chest. They do not itch and are painless unless touched. They hurt kinda like a pimple but they are all over. Some are in groups. The weird thing is that they appeared everywhere where I have not gotten sun. What could it be? After I found my spots, my neice who is 4 got some red bumps on her stomach. But her's do not ich either and they haven't gotten any worse.