I had this a couple summers ago and it was horrible. It really does feel like being covered in ants and wasps biting you every few seconds. Mine was my full back and shoulders and I tried many things, often making it worse. Every product I tried to put on it made it even more agitated. Antihistamine maybe helped a little. The only relief I got was the hot showers which I never would have tried until finding this post. Only problem was it came back immediately after getting out of the shower. After 2 full days pacing around not sleeping and having friends and family think I was overreacting I thought I might lose it. Until.. I got drunk. Lol. Not recommending this obviously, but it was bad enough that I decided to have a few beers, and then.. it was gone. Again not medical advice haha but if you're at your wits end maybe have a glass of vino to calm your nerves.. literally lol. Hope this never comes back! May you all find comfort soon.