What causes continuous growth in the vagina which sometimes results in yeast infections and how can it be treated permanently?

Hard to say: It is hard to say how to cure this permanently. If you have some sort of other illness like diabetes that may be the cause for your recurrent infections. If not then sometimes adding a probiotic to your diet daily can help normalize the gut bacteria and in some women this helps keep down recurrent vaginal yeast infections. Keeping a normal body weight may also help. Hope you find a cure soon.