This is rather sensitive. A few months ago, I noticed a sort of itchy feeling on the head of my penis. It gets pretty red, and a day afterward there was a sort of waxy white film on the head and inside the foreskin that I had to rub off. After that the itch stopped, but it would come back a week later, and its pretty much been a cycle ever since. What is it? I took a blood test from my doctor, and I haven't heard that its an STD, but what else could it be?