I massage my face with fruit pulp of papaya and banana . Yet I break out sometimes, why?

I have oily skin with visible pores on nose, chin and cheeks. I keep the oiliness of the skin controlled by regular gentle massage with a paste of papaya and banana. I leave it on for 30 minutes and wash off the fruit pack. Sometimes i also add lemon juice to it. Though the condition of my skin has tremendously improved, like it glows, is soft, i don't get whiteheads and blackheads now-a-days, yet sometimes i get tiny break-outs in my chin area or near the nose. the break-out has a tiny white head (the pus on the zit) and I want to know why am i getting them. I drink plenty of water, eat fruts and even exercise. Plz help! I want flawless, blemish-free skin!