Female yeast infection or vaginal yeast infection is basically caused by the Candida albicans fungus, mostly present in small quantities in the vagina, mouth, skin and the digestive tract. It does not cause a disease or any symptoms. If the vagina has some conditions favoring the microorganisms or germs, fungus like Candida albicans stands more chances of developing further and forming a yeast infection. Such favorable conditions would mean intake of antibiotics and during pregnancy along with diabetes, yeasts tend to grow easily. Common symptoms include abnormal vaginal discharge, painful urination, painful intercourse, vaginal itching or burning, and redness and inflammation of the vulva.