My pediatrician told me, if it's similar to a yeast diaper rash, you can use athletes foot cream. It's the same thing a pediatrician would prescribe
I always do some aquaphor then the max strength butt paste. His pediatrician also prescribed an ointment that rx only after I sent them pictures of it. I would definitely reach out to them if it's too bad
The only diaper cream that worked for us was triple paste
I've had a prescribed diaper rash cream from my son's pediatrician to help with bleeding diaper rash
When my daughters is really red I use desitin maximum strength the purple package one and it takes it away within a day or two