Quoting Mama to A ♥:" He told us to make an appointment for a week later just in case the anti-fungal cream didn't take it ... [snip!] ... now and its getting better but still hasn't went away fully. How long would it take when your babies had it to heal completely?"
That's weird that you have to go back...I can tell my baby doesn't have a rash just by looking at his bum...lol
When my baby had a yeast rash, he had it for about a month. Nothing I was doing was working...breastmilk would take it away, but then it would come back as soon as I stopped. Vinegar would take it away for a while, but then it came back...finally, I made an appointment at the clinic and the nurse there mixed me up some "miracle cream" (basically Monistat) and told me to apply it up to 4 times daily as needed, along with cornstarch baby powder. I put it on every other diaper change and within 3-4 days, it was gone.