Common Causes
Yeasts, which include the strain known as Candida albicans, are tiny organisms that can be found in small numbers on the skin and within the vagina. Normally, the naturally acidic pH of the vaginal environment helps keep yeast cells from proliferating. However, if the pH becomes less acidic, yeast cells may start to proliferate and result in a vaginal infection.
There are many factors that can cause variations in the acidity of the vaginal environment, including menstruation, diabetes, pregnancy, certain antibiotics, contraceptive pills and steroids. Humidity also seems to promote the proliferation of yeast.
Source: Canesten Global Brochure, Vaginal Yeast Infections Information and Tips for Patients, 2008.