Large Red Dot On Penis Red Dot/pimple On Base Of Penis?

Red dot/pimple on base of penis? - large red dot on penis

I have these bumps on my penis in my skin around where pubic hair grows, and not hurt or bother me or anything, only small stones, which went as a tissue or w / e. One of the biggest appear (one millimeter) in diameter, I to see what was, and just sorta hurt, so I went alone. I had to masturbate today and it hurts, I looked at that moment had the particle size of less inflamed .. I have no idea what it is, it hurts. I'm not sick .. I'm not sure.

Help please?