The itching! The burning! Yeast infections, which most women eventually suffer, are about to get worse. Swedish researchers have identified an increasingly common phenomenon. The yeast is mutating into a version that is resistant to high doses of anti-fungal medication. It does this by reorganizing its chromosomes. In fact, through this process, the yeast can tolerate medication up to 10 times stronger than conventional treatment. The next step for these scientists: find a cure that works for good.