For very big open pores, the oil secretion needs to be controlled, because if oil secretion is not controlled, the pores wont reduce. For oil correction using salicylic acid based face washes, avoiding hair oil are important measures. Apart from that micro-needling or micro-needling radiofrequency, CO2 Laser are better options than just dermabrasion though microdermabrasion might have little effect on open pores.