I have a sort of odd story about acne – not sure how helpful it is, but: I had fairly severe acne into my 20s, and kept it kinda under control with the acne.org regimen. Eventually the dryness was too unbearable, so I stopped using it and mostly lived with my acne. I tried other things, like diets, but nothing worked.
Some time later, I decided I wanted to lose some weight and began working out. Within days of doing cardio workouts at the gym my acne just all but disappeared. Pustules went away, and blackheads started falling out of my pores. My nose would stung a bit at first from pores being exposed.
What is interesting is, even after I stopped exercising, the problem never really came back. My original exercises were soak-the-shirt-with-sweat type exercises on the bike – probably workouts I never quite had, even as a kid. Even now I have the odd breakout, but it’s very rare, usually accompanying stress – and it rarely happens on my face anymore. It most often happens under my scrotum.
Anyway, you don’t say how old you are, and I’m not saying that exercise is key, but maybe some underlying health-related issue is the cause. So far as I know, nobody really knows exactly what keeps acne going.