I know from person experience how painful thrush can be. I have found that nipples can remain sore even while being treated properly- especially if they are cracked. Putting a "dollop" of yogurt onto a clean handkerchief and wearing it in the bra is quite soothing and I think that it aids in the healing process. It has to be yogurt with live cultures, and it must not be a flavored one. (You'd be surprised how many people have asked what flavor is best to use!) I have used this with my own thrush, and have also used it successfully with other moms (clients) as well. I suppose ther is a slight risk of skin irritation- but it feels soo good. Nancy Sherwood LLLL, IBCLC in sunny Perth, Australia