I had pcos before I got it diagnosed its been 3 months. but then I gained weight I have belly fat now. When I was missing my periods as I had pcos from that time onwards I have this itching sensation then followed by burning in the vaginal tract . It used to burn externally when I pee. Later that itching sensation changed its place , it was between anus and vaginal space and now it reached my anus. Itching is not severe all the time. But yes it doesn't feel good.