Sir, I have itching and white small blisters on penis head from last one year, after I had unprotected anal sex with wife, I am using zydip c cream and it cure but once I stopped it reappears again and again, I checked myself for hiv ,vdrl and other tests also, all negative ,i have hsv from last 15 years but I think this is not hsv as that treatment is also noy working from last one year, kindly suggest ,thanks.