I have a rash on my upper arms, chest, and torso. The rash is fine in appearance and seems to itch more at night. Oral antihistimines give very limited relief. I should mention the rash is on my upper thighs as well.
You should maintain clean personal hygiene. It would help to wash all your clothes including bed linen in an antiseptic solution like savlon or dettol (chlorhexidine) and then sun