Candidiasis (thrush)
When the yeast Candida, which is naturally found in small amounts in your vagina, overgrows it produces a white vaginal discharge that can be intensely itchy. Like Bacterial vaginosis, this is not a foreign infection, simply your own friendly bugs taking advantage of a change in circumstances in the vagina (time of cycle, air travel, sex, change in diet or lifestyle, stress). It can be treated with anifungal pessaries and cream, and also by a tablet (Diflucan).