I have had itchy scrotum for years since 2007 if I can remember. I've tried steroid creams. They helped but always came back. For 10 years until I found a cream called Yigangerjing(don't know if it contains steroids). I use it with Gold Bond Triple action relief to keep the area dry and less friction. It went away in a week. Because of so many years of using topical steroid creams the skin on the scrotum is cracked so now I stopped using yiganerjing and only apply a bit of Nature's Gate Tea Tree Calming Body Lotion to moiserize that area. So far so good. No more itching! No more urge to scratch!
I also changed my diet and make my own kefir yogurt for probiotics. Maybe that also helped. But for sure I know the cream did.