I have the same type rash that came onto me back in 2012 after I walked out into a field with only sandals and cutoffs. that night after I got out of the shower I noticed on my left leg, red marks looking like bites, they had a tingling itch.
My hubby applied some lotion to both legs to take away the itch and dryness. Well, it got worse, progressing to a burning, itching, welted, disgusting sight. This stuff reappears now every year. I spray Listerine mouth wash on, it calms down the burn and itch. Now my legs have tight skin, swollen, turn red, and peel off dead skin, still have bumps, some seem full of liquid. I'm taking Olive Leaf Extract
9 a day, it seems to have quited down. Another thing I notice it feels like something crawling inside my legs. It stays on my feet up to my knees. I have been told it could have been chigger bites, or a weed called Sumac, deer ticks, or spider bites. Whatever it was that got me is very debilitating.