It could very well be the shingles adult version of chicken pox. You should seek medical advice as soon as you can as the shingles is highly contiguous to others, also it will rule out anything else that it may/not be.
WHAT CAUSES A BROWN NON RAISED BLOCHY TORSO AND BACK RASH?
Answer See a doctor immediatly!!
Sounds like you have Psoriasis. Look it up.
*scratch
It is a birth mark.
Yes, the typhus rash may itch, especially if it is murine typhus.
poison ivy
maybe it is jock itch or heat rash
Excema
To relieve the itch, an oatmeal bath.
I obtained rash from Astilbe plant and mine didn't itch at first but does now. Its day 5 .... how do I get rid of this rash?
itch skin rash - hives itch or watery eyes sneezing stomach ache