there are 2 good reasons to learn a bit about the causes of vaginal yeast infections. first, if you have recurring yeast infections, you can figure out what's causing them and then work to prevent them, rather than just working to kill the yeast every time they take over. second, if you know what kinds of things cause you to get yeast infections, you can be alert for symptoms and treat them early on with the generally-milder do-it-yourself remedies, rather than bombarding your body with drugs.