Hi. I have a guestion for you all. Can diarrhea cause a yeast infection in babies? My 14 month old twin sonsboth have a real bad rash and diarrhea. They have had them both for a week or so and they don't seem to be getting any better. I have tried everything from creams to corn startch. And none of them have worked. I still don't know why they have the diarrhea and it doesn't seem to be going away ether. I am worried that it might be something a little more then just a diaper rash. Does anyone have any idea what this is and if a yeast infection can be caused by diarrhea?