Hello my name is john, I'm 170 lbs, 6'2, and I'm 21 years old. Ive been having what looks like a simple on my scrotum but it disappeared already I had it for a week before hand. A month earlier I had the same simple like bump on the lower shaft of my pens, I shave with a razor, both shaft and scrotum. Normally in the shower. What could this simple thing be ?