I have a bump on the shaft of my penis. Not sure what if it is pimple, cyst, or STI related. I am not sexually active with anyone.
It is a pimple. Do not pop it I had one that size month’s ago. What you need to do is put hoy rags on it or a heating pad. Let it pop on it own. After it pops clean it out and let it heal. Mine never came back
Good luck…Ken