Under foreskin is red and waxy looking, scrotum skin seems red, skin on my thighs/bum get sore

hi, I’ve been suffering for over a year with constant redness under my foreskin, sometimes it gets worse what seems for no reason. the skin on my scrotum seems very red and irritated sometimes, its like I have to constantly adjust myself but I’m not finding either to be itchy. any skin that seems to be in a skin fold (thighs touching, in bum cheeks etc) seem to always be very irritated and worse when hot (it can be from a simple thing like driving to work what I can’t avoid)

doctors and dermatologists cant work out what it is and I have no way of curing this, i have tried many and fluconazole table to to no also had a biopsy done but no abnormalities.

I am at a lost end and really need some help.

cheers