Hi, I have a reaccuring yeast infection under breasts, and also just developed at lower stomach area where lower stomach folds a little. Dr Rex nystatin powder and cream, will clear for a few days, but then returns, almost like a flare up, for no apparent reason. I find that using cornstarch helps prob as well as the Rx. Should I maybe start an oral med??.......dr said use the nystatin more consistently......??