A yeast infection is a fungal infection ... They usually reside in the anus and are harmless. The bacteria can become problematic if they make the short journey from your anus to your urethra ...

A yeast infection in the vagina is known as vulvovaginal candidiasis (can-dih-DYE-uh-sis). Vaginal yeast infections are common, and many girls will have one at some point. Treatment can clear up the ...