It may not be possible for all women to prevent yeast infections, but here are some things you can do to lower your risk:
Wear breathable underwear. Cotton is your best choice. It doesn’t hold onto heat or moisture and will help keep you dry.
Keep things loose. Make sure your jeans, skirts, underwear, yoga pants, tights, pantyhose, etc. aren’t too snug. They can boost your body temperature and increase the amount of moisture around your private parts. That raises your chances for a yeast infection.
Don’t douche. “Feminine hygiene products” like douches can disrupt the balance of bacteria in your vagina by removing some of the good bacteria that’s supposed to be there to fight off infections.
In the bathroom, always wipe from front to back.
Use antibiotics only when you have to. You don’t need them for conditions like a cold, because they don't work on viruses.