Re: Cortopin/steroid cream question...
cortopin is suitable for use 'down there'. It just hasn't been licensed for that condition in the over-the-counter format. you can always patch test it first.
If you don't feel happy using it then take it back and ask for some daktacort HC cream instead. It has the 1% hydrocortisone in it and an antifungal called miconazole in it too (very useful if your rash 'down below' has any associated fungal infection).
“It's not worth doing something unless you were doing something that someone, somewhere, would much rather you weren't doing.”
Terry Pratchett