First, you need to stop popping them. If it's a bacterial thing, you could be spreading it.
Have you ever had any sexual activity? Oral sex, even?
If you were my son, I'd want to know if something was wrong so I could take you to the doctor. I know it is horribly embarrassing to you, but your parents have their own genitals and know that sometimes, things happen.
In the meantime, make sure you are washing the area with a gentle soap (like Dove or Ivory or something not really scented), once a day and keeping it dry (just pat it dry with a towel a couple of times a day).
If you can't tell your parents, is there someone else you can tell? An aunt or uncle? An older brother? Someone?
Let us know what happens. :)