I have a slight concern; I do not think it is an std, as i have gotten something like this before i was sexually active. I have heard it's from jacking off too much, and it looks pretty much just like a pimple. Anyone have input?
It looks like you ended up rubbing your skin raw.
If it does not get better in a week go see a doctor.
I use Coconut Oil when I jack off for an hour or 2.