Hello, I am 17 years old and about 3 months ago, I noticed 2 bumps on the head of my penis. I went to the hospital and they checked it and told me that they don't think it's an STD. It didn't itch, burn, or anything of the sort. I noticed that when I masturbated, it would appear (probably about a few days after). I also have been using different types of soaps because of the soaps that my mother and father use (since they are divorced). I tried using a soap for sensitive skin and that seemed to work just fine. But then, I ran out so I started using the regular soap. About 3 days later, I went to sleep and when I awoke, I noticed there were a few bumps on my penis, in one cluster. I didn't worry about it as much but I continued using the soap. The next day, when I came home, I noticed that the bumps had spread, looking like blisters with water in them. I haven't had any unprotected sex and I haven't had sex for at least a month or 2. I have no idea what is going on!!!! I'm pretty much worried. Could this be from soap irritation or sweat from when I was sleeping? This would be highly appreciated if you could answer this question anybody. P.S. The bumps do not itch or burn. They are just there on the shaft of my penis.