Hey everyone I'm not totally comfortable saying this to a load of people i don't know and even more on the internet on the internet but any advice i would like to have please

i have been to the doctors a number of time having checkups i have recently changed doctors because my other doctor couldn't find anything wrong with my penis but ever since I've been to my new doctor hes give me a anti-boitic to treat a infection i have got but recently

I have found a zit or spot not related to the infection at the top of my penis but above the scrotum and it burst when my penis went erect i asked my dad do you get zits or spots on your dick and he said "yes you do just clean it up and bath it up in some hot water so i have cleaned it up and washed it and put some aqueous cream BP on it since it is a cleaning agent now is this spot normal to have on your penis? i mean it was really big compared to a normal spot on your face and when it burst some gooey stuff came out too the color of the gunk that came out was white/yellow and after that some other stuff came out too then it just went smaller until blood came out like a normal spot on your face.

Thanks for any of your help