Saccharomyces and Itching

My doctor recommended the probiotic Saccharomyces boulardii to help with long-standing diarrhea. I took it for a while and recently read that it may cause a reaction if you are allergic to yeast. Which I am, both to baker's yeast and brewer's yeast, and even to candida yeast. So I stopped taking the Saccharomyces capsules to see what happened and the next day noticed that the itching that had been causing problems for several months went away. It was a severe itch under my breasts which was somewhat helped by athlete's foot cream.

And no, the capsules did not cure the diarrhea. I'm now taking a different probiotic L. plantarum (as LactoflamX) and it does not make me itch.