The past mont or so I have noticed a small rash on my penis. It went from one to three. It starts of as tiny red bumps that can be washed off but comes right back. It itches, when I scratch, my skin turns white silvery color and flakes off. I t started on the shaft & now on the head also. I was told it can be anything from scabies, herpes, or a yeast infection. please help!