Best treatment for diaper rash besides cream? Someone help my baby!

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My girl has a BAD diaper rash!!! I’m tried every cream and it’s not going away. I switched brands of diapers and wipes too but it’s not helping. I even gave her an oatmeal bath, which helped a little. And DIY or at home remdedies you guy use on your babies ? It would be MUCH appreciated!!

Here’s my girl

Update: ended up just taking my girl to the doctor and they prescribed a special cream and she has a follow up in two days. Thank you to everyone who helped !