Hi, about 2 weeks ago i started noticing an itch in the head of my penis, and last week i pulled back the foreskin to find a lot of white substance built up there. I cleaned it, and after a few days the itch went away but this substance is still there (after not washing for about 2 days). I have never been sexually active and I am 16 years old. What should I do !? Oh btw, there's no burning when i urinate or anything.