I have a rash on my arms. It started a few days ago with tiny  pimples like rash on my hands and wrists. About 7 pimples. Now it moved up my arms almost to the shoulder on my right arm but the rash changed. Instead of tiny pimples I have about 1 cm size round red a little raised spots. I have three on my right arm. And had one on my left on on the wrist (2 pimples close together actually become a spot like that). I also have a couple spots on my right hands fingers too. I think I might have a couple pimples on the back of my neck (lower part).It doesnt always itch, but when it does it itches a lot. I never had any allergies.
Howell come to ChatDoctorI really appreciate your concern, two possibilities are there one is allergic condition and second it could be some viral infection in either case first is to wait for some time it may come around on its own, second it can be managed with steroid and antibiotic like "Beclomethasone" and Aureomycin" cream, else this is noting to worry, hope this information helps, take care and have a nice day.