question: Hello, i was recently masturbating last night for the first time and i orgasmed and then ejaculated.About 20 mins later i checked out my penis again, to find that there was a lump on the shaft of my penis (left side) it stung when i pressed it in at first but a day later i went to school and when i came back i checked to see if it was better (and it was)then i pressed it in again and it dident sting at all.If you need my age i am 12Also there is some tiny pimples on my penis going all the way to the top, they do not hurt or itch in any way so im not really bothered in any way.I do not want to see any doctor.