11. Perhaps most important is to know how to prevent vaginal yeast infections and vaginitis in general. 12. In post-menopausal women, the walls of the vagina become thinner ( atrophic vaginitis ). 13. The three main kinds of vaginitis are bacterial vaginosis ( BV ), vaginal candidiasis, and trichomoniasis. 14. But even with something as seemingly mundane as vaginitis , a delay in proper treatment can have serious consequences. 15. Women who have sex with infected partners and postmenopausal women with thinned vaginal walls are especially prone to vaginitis . 16. In clinical trials of 2, 300 people, about 14 percent of users had vaginitis , for instance. 17. Foreign body vaginitis ( most common foreign bodies are retained tampons or condoms ) may cause extremely malodorous vaginal discharges. 18. Further, either a change in pH balance or introduction of foreign bacteria in the vagina can lead to infectious vaginitis . 19. These include acidic foods; emotional or physical stress; various medications, and coexisting illnesses like colds, flu or vaginitis . 20. Women spend about $ 250 million each year on over-the-counter drugs, according to the National Vaginitis Association.