A fungal infection is a type of vaginal yeast infection. Candida, a type of yeast found in your body, causes vaginal yeast infections. Candida is a type of yeast, and it is a specific type of yeast. There are no issues when this yeast is in balance within your body. When the yeast is out of balance, it grows rapidly and can cause a yeast infection. A yeast infection causes burning, itching, and redness in the vulva (the outer parts of your vagina) as well as changes in your vaginal discharge. A yeast infection is not transmitted sexually (STI).