Suggest Remedy For Blisters On Genital Area

I have been suffering from i guess blisters on my genital area.It started with a small blister then turning big and after some days bleed some pus and blood. suffering from almost 3-4weeks. recently sensing a lot of itching at times. this is the first time i have this problem. recently shifted to b'lore so have no one to consult. plz help