I do not know what it is. I have had mollescum contagium but never on the shaft, only on the lower belly. But that was takin' care of awhile ago. Im 21 years old and a little nervous about this bump. It does not itch but recently has become inflammed.
2 things; first see your Dr and don't worry
2nd try to flood your body with probiotics; now u will need a vitamin store because u r looking for ULTRA HIGH CULTURE COUNTS so u can take 100 billion daily for a week (not million)
if u do have this same mollescum contagium on your genitals then u should consider it as contagious for a std AND take precautions till u fix it BUT THAT DOES NOT mean that is what u have so go back to 1st see Dr
good luck it might just be a pimple or ingrown hair