Yahoo! Style

Abi Oleck, celebrity facialist and aesthetics expert at BeauSkin London, explains the logic. “We have approximately 20,000 pores on our faces. A higher level of sebum activity tends to correlate to a larger pore size. In the summer, we tend to swear more and this, combined with excess oil, can clog the pores,” she says.

What’s more important, though, is the way in which sun exposure in the summer damages our skin and therefore impacts the appearance of our pores. “Sun exposure increases the level of destructive enzymes that tear down collagen and firming elastin and enlarge pores,” she adds. So while SPF might feel as though it’s worsening the situation by creating an oily film that feels like it’s congesting the skin, daily application is crucial to keep pores looking healthy.