The live culture in yogurt is a popular remedy for treating thrush since it can help re-establish the bacterial balance in the affected area. The simplest way of doing this is to include plain, unsweetened yogurt in the diet, but the same can also be applied externally to the vagina. To apply, smear a little bit of yogurt on the affected skin and let sit for 20-30 minutes.
Alternately, lactobacillus suppositories can be inserted vaginally to treat the condition and followed with vinegar douching for a few days. Or dip a tampon in yogurt and insert in the vagina for two hours.