A vaginal yeast infection is a fungal infection that causes irritation, discharge and intense itchiness of the vagina and the vulva — the tissues at the vaginal opening. Also called vaginal candidiasis, vaginal yeast infection affects up to 3 out of 4 women at some point in their lifetimes. Many women experience at least two episodes. A vaginal yeast infection isn’t considered a sexually transmitted infection. But, there’s an increased risk of vaginal yeast infection at the time of first regular sexual activity. There’s also some evidence that infections may be linked to mouth to genital contact. Medications effectively treat yeast infections, however, if you have recurrent infections there may be a need for a long-term treatment and maintenance. Symptoms range from mild to moderate, and include itching, burning sensations during urination or intercourse, white discharge, vaginal rash, and vaginal pain. Ways to avoid getting a yeast infection range from wearing clean clothes after workouts to staying away from unclean hot tubs. Yeast infections are very common and not often need prescriptions. There are many over-the-counter options available to clear symptoms or even prevent symptoms.