One BIG noticeable ZIT!?

So, in general, I have very nice skin for a teenage girl, barely any pimples etc on my face. But I tend to get a certain zit or two that will be quite large in size, and quite red in color....that will appear for approximately a week, disappear, then REAPPEAR a month or two later...I wash my face twice a day with the correct wash, toner and moisturizer. I've tried popping a certain one on my forehead, but it tends to not pop, and become uncomfortable, almost like a small bruise. But I do swim competitively 22 hours a week, which could be doing something? What can I do to at least avoid the redness in color? Or even make the zit(s) go away?