If you are prone to frequent vaginal yeast infection, consider practicing milder sex. The sex could indeed be involved in recurrences if they are frequent or spaced and intense. Feel free to use lubricating gel or do more foreplay to avoid unpleasant rubbing. In addition, spermicidal gels, in the form of a cream or an ovum (a kind of suppository), are not recommended because they attack the vaginal mucosa and can therefore promote the appearance of vaginal yeast infection. In contrast, vaginal yeast infection is not considered a sexually transmitted infection (STI).

HELLBERG D., ZDOLSEK B., NILSSON S., MARDH P.A. Sexual behavior of women with repeated episodes of vulvovaginal candidiasis. Eur. J. Epidemio., 1995, Vol Il, 575-579.