Female yeast infection is the commonest condition caused by yeast. This is as yeast not only lives in the courage of ladies also in the vagina. Men often suffer from tummy related yeast infections. When yeast grows too swiftly, they cause an infection called candidiasis which is a vaginal yeast infection. The systematic name for yeast is candida albicans. Some of the major reasons behind yeast infection are pregnancy, contraception pills, menopause and monthly periods. These factors will cause hormonal imbalances that may see an unstable environment created in the vagina giving rise to an infection.