Enlarged pores are genetically determined or caused by the accumulation of excess sebum or impurities that clog them. Although you can’t permanently change their size, pores can appear smaller if they’re deeply cleansed. As with the rest of the skin and pores, with age their elasticity and ability to shrink decreases and they begin to appear larger. Cleanse your face in the morning and at night so that your facial pores don’t get clogged.
Flament, F., Francois, G., Qiu, H., Ye, C., Hanaya, T., Batisse, D., Bazin, R., „Facial skin pores: a multiethnic study“, Clinical, cosmetic and investigational dermatology, (2015) (8), 85–93