What Donna says. I've had a few reactions the last few years - oh, the joy of getting older! And the itching!!
I tried SBC propolis and fresh aloe vera. I also tried some Creme de la Mer that was bought for me years ago and I never really got on with. The La Mer worked overnight! I'd never used it "properly" before as I'm always cold, even in the height of summer. However, I've been taking extreme measures against getting cold, especially before bed as I cannot sleep unless I'm warm and hate wasting hours in bed trying to get warm. Anyway, for the first time ever, I actually had warm enough fingers to "liquefy" the La Mer (boy, what a weird feeling - turned from a heavy, thick, lumpy cream to a slippy,soft, smooth liquid silk), applied to my skin, and WOW! Next morning it was clear (it did come back a few weeks later, though). I've run out now and can't afford a new pot yet so I'm using the stuff the doctor gave me. Steroid cream and a HUGE tub of a really cheap cream that I forget the name of - something-mol. My old doctor gave me Diprobase (didn't work), but this stuff has been quite good. I assume it's some kind of aqueous cream as you can wash with it, too.
The steroid cream does the trick, though. If you can't get to your doctor, you can buy it over the counter for a few quid.
Hope your skin clears up soon. I'd never had these reactions before, so never had much empathy, but I've walked in your shoes now and they're not nice to have.