 Tweet (NewsTarget) Yeast infections are caused by an overgrowth of yeast which can affect the skin (yeast rash), mouth (thrush), digestive tract, esophagus, vagina (vaginitis), and other parts of the body. Yeast infections occur most frequently in moist areas of the body. Although Candida albicans and other Candida yeasts are the most frequent offenders, other yeast groups are known to cause illness. These include Torulopsis, Cryptococcus, Malassezia, and Trichosporon yeasts. Here are some natural and home remedies which may help: Vaginal Yeast Infections: 