Direct overexposure of the skin to sunlight can hyperactive sebaceous glands release extra sebum that makes the skin oily and the pores larger and noticeable. By applying broad-spectrum sunscreen daily with high SPF on the areas exposed to direct sunlight, the skin can be saved from damage, oiliness, and the appearance of open pores. If you have open pores, it is recommended to apply mineral sunscreens and not oil-based sunscreens as they can clog pores and worsen the open pore’s appearance.