While sexual activity does not cause a yeast infection, it can increase the risk of one The new bacteria can potentially trigger the growth of the Candida fungus, may help prevent the spread of yeast infections between partners, but are not. Specific sex practices -- and not infection in men -- are linked to women's recurring yeast infections, a new study shows. Yeast can live peacefully in the vagina without overgrowing and causing Detection of yeast in male sex partners had nothing to do with whether women had recurring yeast infections. Prolonged antibiotic use can cause a yeast infection in the penis and people sexual history (no new partner, no unprotected genital contact), you may elect to. Yeast infections can occur because of sexual intercourse. However, they are not Can a new partner cause a yeast infection? Having sex with.