ARS rash won't itch, in fact most people with true ARS rash don't even notice it because it is so faint in appearance.
your rash could be due to all sorts of things, try taking benedryl. Maybe you have sensitive skin and its a new detergent possibly? Might also be hives. Stress can cause hives.
ARS is a constellation of symptoms. If it was just a rash and nothing else I would think of other causes. Allergy? Nervousness? Heck, from experience just bad weather makes me break out in a minor rash.
And beyond 4 weeks is unlikely.
i had a rash 4 weeks 2 days which did itch and went away within 2 hrs after my doc gave me a steroid shot. And Teak says no allergy meds or even steroid shot would have made ars rash go away. Anyway latley ive had some sort of rash issue on my back cheast n neck . I first thought it was ringworm but no treatment made it go away and now its popping up here and there.It kinda looks like exzema or maybe im under attack from some weird bugs that are in my garden .
Only happens during ARS, normally 2-4 weeks post exposure