What Is A Yeast Infection? Hey BeingGirl Experts! What's up? I was just wondering, what is a yeast infection? I see all these commercials for treatments for a yeast infection, but I don't know what it is. Please help! Susan --- Dear Susan, A yeast infection is very common form of vaginal infection. Yeast, a fungus, may overgrow your vagina when you take antibiotics, the birth control pill, over-douche, have diabetes, wear a wet bathing suit too long, or wear sweaty leotards (among other reasons). The symptoms of a yeast infection are vaginal itching, redness and intense burning, and a cottage-cheese like discharge, but no odor. It is important to see a health care professional the first time you have a yeast infection to make sure you get the correct diagnosis. Once you know what the symptoms of a yeast infection are (and it was confirmed to be a yeast infection) you can try the anti-fungal medications sold in drug stores. You should let your health care professional know if your yeast infection symptoms don't go away after you use the medicine. BeingGirl Experts Wondering what is a yeast infection? Get answers and tips from the experts at BeingGirl.