Diaper rash help!

Jennah

Hello everyone! Our 11 month old has only had very mild diaper rash before and now we had this new rash pop up a few days ago, I have tried all the diaper rash creams, earth momma, badger, desitin, oatmeal baths with no improvement. It’s a completely different rash than I have ever seen before, ulcerated very red bumps. Anyone’s baby had this?? Photo attached