I have been getting yeast infections after my periods for a few months now. Why is this? What can I do to prevent this from happening? They're not HORRIBLE infections...they just itch a little and are irritating. I'm wondering if the fact that I don't dare scratch it keeps it from turning into something unbearable? But what can be done to prevent this from happening? I'm 25 and just now this started happening. What might have changed?