Dry skin easily parched and flaky, calling out for moisturizers. Tight, dry skin easily traps acne bacteria in its small pores. Because the pores are small (and drying out the skin makes them even smaller), the immune system can easily cause inflammation throughout the entire pore, creating multiple, small, red pimples.
It is possible for skin to be dry and oily at the same time, but this usually only happens across the cheeks, around the eyes, and on the nose. Anytime your skin is dry the first thing you must do is to stop using any products that rob it of moisture.