Oily skin is prone to blackheads, breakouts, and large pores, especially in the T- zone (forehead, nose, and chin areas). When sweat glands produce too much oil, pores become clogged with a mixture of sebum and dead skin cells. Accumulated sebum contains propionic acid bacteria, which is released into the tissue causing an inflammatory reaction. The pores expand to accommodate dirt and oil. Over time, the pores will stay expanded giving the appearance of rough skin texture.
Additionally, oily hair products tend to aggravate and create other problems for our skin. You should deep clean your face to remove accumulated dirt and oil to minimize your pores.