Mild inverse psoriasis in the buttocks

Hi, just signed up as I’ve been struggling for a few months now. Had ppp about 15 years ago for about 5 years. Ever since I have mild pp on my knuckles. Not so bad, and I use dovobet with fair success. Or I ignore it. For the last 6 months I’ve had a very uncomfortable bum. I get piles from time to time, and assumed my bum was raw from using creams. However, it’s every day now. Any level of sweating results in a lot of stinging and chafing. It’s making work and social difficult. I saw a dermatologist, but he was quite dismissive, telling me that my physical response to what he was looking at was disproportionate, and i might be better speaking to a neurologist. He said that as I have psoriasis, then it’ll be linked to that. He didn’t mention inverse p, but I’ve found it by googling, and my bum looks very similar to “mild inverse psoriasis “ images. He told me I could use daktacort (although he said there was no sign of a fungal infection), or I could step up to eumovate. I’ve been using 1% hc for a week, but I’m getting no results, plus a damp/warm bum from the cream makes it worse during the day. So, are there any non topical things/miracles to try next? I’m reluctant to go to eumovate, as I don’t want to get on the steroid train for such a sensitive and delicate area. Oh, and I’ll be getting on the blueberries as of tomorrow! Thanks, and sorry for the big intro.