What is this thing on my penis?

Ok. So I’ve finally decided that I want to become a doctor at the age of 14 and a freshmen. lol. But, like what I wanted to ask was I get sick like every other month or so and when I do get sick there is like this “zit” looking thing on my balls. Not on the head or on the shaft but like just like one or two on my balls, and I wanted to know what it was. I am still a virgin and all that I just know it’s not entirely possibly medically for someone my age to get sick this often and its like not a big flu it’s more the 24 hr cold thing. So that’s what I was wondering and also I’ve been jacking off for like 3 years now and I have this app on my Ipod (people may think that this is weird) that is for sex facts :) lol. And it said that men who masturbated before puberty have a tendency to not cum. I thought that it couldn’t really apply to me because there is like every once in a while when I’m sleeping and the nocturnal emission happens so I’m wondering from anyone what could this be??