Yes, you can make some oatmeal as it contains an anti itching agent that sort of sucks the redness and swelling as it cool and dries on your skin.
After a cool shower as hot water will irritate your skin rub some oatmeal that you have cooked and let cool on your skin.
Let it dry and then just wash it off with cold water.
After wards using your regular medicine too will help.
After moving to Japan I have experienced many nasty rashes.
Take care matey!
Its the infamous midges, our accomodation was very close to a Loch. I have always reacted extremely bad to any insect bites, i just scratch and scratch...Nettles are my Nemesis!!!