Girls, who had this? The third day it's itching, on arms to elbow, on …

Girls, who had this? The third day it's itching, on arms to elbow, on legs to knees, and stomach, they come out like pimples and itch. Excluded sweet, everything that could provoke. But it doesn't pass, I smear with Sudocrem what I brushed off, but it doesn't go away, unconsciously and in dreams again itch?