White pimple looking thing on the bottom under side of my penis I popped it and blood came out and then it came back the next day bigger what is it?

Penis cyst. MattH ~ a small sebaceous cyst or folliculitis ! Leave it alone because you will infect it and cellulitis of the penis aint pretty! If the spot gets bigger go see your doc to get him remove it! thanks :-))
PENIS PIMPLE. I CANNOT SEE THIS PIMPLE-LOOKING THING. PLEASE SEE YOUR PCP OR DERMATOLOGIST. IT DOES NOT SOUND SERIOUS . . .