Suggest Treatment For Itchy Vagina

My vagina itches a lot. When I m on my period and I use sanitary pads, after a while it feels like my skin Is burning. Then after somedays my skin begins to peel. Infact its like my skin is always peeling. When I scratch it sometimes bumps come. Sometimes some bumps have puss in them. And when I scratch, my skin peels off. What could be the cause?