The first step toward yeast infection prevention is to understand what a yeast infection is. The body is filled with natural flora that helps to keep the body functioning normally. One such flora is Candida alb cans, which is a natural inhabitant of the vagina. Certain things, like heat and antibiotics, can cause an overgrowth of this flora. When this happens, a woman has a yeast infection and must seek treatment for symptoms such as burning, itching, redness and other discomforts.