I had yeast infctions many times, still have, aand also on my nipples. Now it's gone (off my nipples. I still have fequent vaginal yeast infections). I also found out I'm sensitive to many things. Eg I've become sensitive to daktarin (miconazole nitrate). With your client, given the long history of yeast infections, I would check for allergies (since she is complaining about the direct contact with formula), and also pets. We had 4 cats and I think the yeast in their ears have contributed to our recurrent yeast. What helped me: I took capsules with caprylic acid (as recommended in Baumgarten and Michel's "A women's guide to yeast infections"), and I washed my nipples with Lactcyd. Lactacyd is sold her as a 'acid soap'. It is made of 'milk acids'. In other words, it has acidophilus and bifidus cultures . It is sold here as a vaginal soap, and it helps me for both my vaginal yeast infections as for my thrush on my nipples. I'm no thrush-free for several months. Annelies Bon http://utopia.knoware.nl/users/abon/bfbronnen.html breastfeeding counsellor of the Dutch bf org "Borstvoeding Natuurlijk" mailto:[log in to unmask]