What is this strange rash?!

i had this rash around my ankles this arvo, it just looked like a few sand fly bites and was really itchy so ddnt think much of it. A few hours later it had spread up to underneath my legs and got red and irritated and the "bites" got even bigger. Not long after it was on my thighs and in the insides of my elbows. They look like welts or blisters and are really itchy and red.
i was wearing my favourite jeans and i havent change anything like my washing powder and i havent recently shaved my legs.


What on earth is it and how can i stop it itching or get rid of it.?Health Question & Answer

---

---