I use QV moisturizing cream. No need buy the baby ones. Adult ones can be used on babies as well. My LO got rashes/eczema and doctor gave QV moisturizing cream for him. Bathed him in QV wash as well.
You can also try applying breastmilk, it has strong healing properties
My pd ask me try ceradan. So far so good but expensive -_-
I use cetaphil and sudocrem