Puriya cream & calmoseptine, are supposed to be good. MY BIL got relief smearing Aveeno anti-itch lotion on forehead (beige bottle & navyblue lid).
Also – apply aloe vera & cold-wet cloths. And alternate with oatmeal or naphtha soap.
Also mild diet, cutting citrus, spices, spices, sodium, alcohol, dehydrating environment, bright lights.
I once had the worst possible case of poison ivy, which causes similar symptoms, so i can relate. What had offered me some relief were Calamine, aveeno-lotion, cool baths & naphtha soap.