Re: Yeast Diaper Rash that won't go away? - UPDATE with Pics, is it really yeast??? H
My second child had that same rash!!!! It was a dairy allergy he had even with breast milk from me. Once I cut out dairy, it was gone in 2 days.
If you are nursing, stop all dairy and see if it gone in 2 to 3 days tops.
I'm not sure what you can do if you formula feed (I've never used formula) but I'm sure other mama's on here could help with alternative milk.