Yeast infections can go from the oral cavity (mouth) to the anus. They occur within the GI tract. Yeast is naturally occuring in the GI tract. It can become overgrown when there has been an upset in hormonal balance, antibiotic use, or compromised immune system. Medications can treat vaginal yeast infections. Probiotics from a natural food and supplement store can help to replace normal bacteria to the GI tract and reduce yeast growth.

You are on bc. This is more than likely the cause of your yeast infection. If you and your boyfriend have normal, healthy immune systems you should not be concerned with transmission to the mouth. Oral yeast infections, thrush, present with white patches on the gums and inner cheeks. They will not just rinse or wipe away. Medication, nystatin, is used to treat oral yeast infections. You can just get probiotics and take the capsule 3x/day. This will help greatly to keep the normal flora in the bowel at the correct balance. Probiotics are over the counter at any natural food store.