Hi, Yes, the birth control pill yasmin can cause thrush/yeast infection. Yasmin is a combined oral contraceptive pill that contains two different hormones viz. estrogen and progesterone. Taking these pills can cause hormonal balance which helps the yeast to grow. It is believed that the estrogen in birth control pills can cause the vagina to produce more sugars. These sugars feed the yeast already living in the vagina causing overgrowth and thus infection (vaginal thrush or candidiasis). It is a similar effect to that seen in pregnancy when estrogen levels rise naturally. If the infection bothers you too much you could be switched to a different kind of contraceptive pill with a stronger progesterone component and a weaker estrogen component or consider going on the mini-pill which only contains progesterone. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr. Mohammed Taher Ali, General & Family Physician