I'm used to having the occasional penis pimple every once in a while, but I noticed that I've had 3 in the past month alone. The first one subsided easily with warm compress, while the second one ballooned quickly, which I popped last week. Pus and some blood came out, but I think it's healing up well. Both were on opposite sides of the underside of my shaft. Now, I noticed another one starting to form on the topside of the shaft. I'm not really sure if this is just acne. I can post pictures, if ever.