I'm fifteen years old and about a month ago I noticed a small bump on the shaft of my penis. It grew larger in size within about a week and I popped it and pus and some blood came out like a pimple but it didn't completely go away. The lump then grew large again and I popped it. Whenever I squeeze it I can get a very small amount of pus out but its still not going away. I'm a virgin so it's not an STD and I shave so it could be and ingrown hair. There is no abnormal amounts of pain or other symptoms. I'd like to know what else it could be or have some advice on what to do. I would really rather not have to tell my parents.

In all probability the lump is from masturbating, cranting. And the more you keep on squeezing it, the more likely it will turn into something. If the substance coming out was green, or any other colour, then yes, it was infected and should be looked at by a professional, if not, and just white, it was subaceous gland material.