I keep getting yest infects and i take all the medson my obgyn gives me to take .but i keep getting them why could that be?

Yeast infections: Recurrent chronic yeast infections can occur for a number of reasons. If you diet is high in sugars and carbohydrates you may create the perfect conditions for a yeast infection. So, try a low carb diet with lots of veggies and yogurt (no potatoes/rice/wheat), cotton underwear only change every day, don't douche, change wet/sweaty clothes, avoid feminine sprays & tampons.

Imbalance : All women have yeast in the vagina, but it is suppressed by the normal bacterial flora. If the bacteria is out of balance, yeast or abnormal bacteria will overgrow and cause symptoms. Curing a yeast infection not only involves medication, but also requires restoring the healthy bacteria. Doing probiotics, like eating yogurt, will help. Do not douche, as it washes out both bad and good.