Large or enlarged pores are more visible. They tend to be found on oily or aging skin and can get clogged with debris and oils, like sebum, that should flow out of pores. Those with large pores can be more prone to breakouts. Most often, genetics determine who will have large pores. Other causes for large pores can be oily skin, since excess oil sits around the skin’s pores, making them appear enlarged.
Oily and unclean skin can also cause oils to settle around the pores, making them appear larger as the skin around them thickens. Skin thickens, too, from sun damage and aging as cells build up around pore openings.