C.H.
I know with my son we give him a bath with oatmeal in it to help soothe the area. Also we apply Aquaphor every time we change his diaper (every 2 hours if bad rash). He airs out his bum when he can and I even keep a small hairdryer near him to dry the area off. Also probiotics work wonders with flushing out the "bad" stuff inside! We give him yogurt and add culturelle or a similiar product daily and we also don't give him milk as it can cause his rash to be worse! Good luck!