Do pores really open and close?

Pores do not open and close. They are the visible openings of pilosebaceous follicles and do not have a sphincter: steam does not fling them open, and ice-cold water does not seal them shut.

What changes is their appearance. Sebum, surface cells, hydration, temporary swelling, and the way light hits the surface can make them look more or less noticeable. The distinction may seem pedantic, but it completely changes what makes sense to do.

Cover image generated with the support of artificial intelligence.

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What we call pores

In everyday language, we call pores the visible openings of pilosebaceous follicles, which are particularly noticeable on the nose, cheeks, and forehead. They are normal skin structures connected to the follicle and sebaceous gland. They are not imperfections to eliminate, and they do not indicate that the skin is dirty.

How visible they are varies greatly from person to person and even from one area of the same face to another. The literature identifies greater sebum production, follicle volume, and reduced elasticity around the opening among the main factors. Genetics, age, hormones, acne, and photoaging also play a role.

Why they do not work like little doors

If I think I need to close a hole, I will look for drastic, immediate solutions. If I understand that I am looking at a normal structure whose visibility depends on several factors, I can choose a realistic strategy.

It is the difference between asking, “How do I close them?” and asking, “Why are they more visible on my skin right now?” The second question has an answer; the first does not.

Steam and cold water: what they really do

Heat and humidity can soften sebum and surface material, and cleansing afterward can make the skin feel cleaner. But very hot water, prolonged steam, and rubbing increase dryness and irritation. For daily cleansing, the most boring rule applies: lukewarm water and your hands, without overdoing it.

Cold water can create a toned sensation and temporarily alter redness or swelling, but it does not reshape the anatomy of the follicle. As temperature and microcirculation return to normal, the visual effect changes too.

“A pore does not open and close like a door. Only how full it is and how much shadow it casts change.”

Can their appearance be improved?

Yes, but the correct word is improved, not erased.

Proper cleansing prevents excessive buildup without stripping the skin. Actives that work on sebum, keratinization, or surface quality can make the skin texture more even: salicylic acid enters the pore because it is oil-soluble, while niacinamide works on sebum production. Sunscreen also helps limit UV-related deterioration of elasticity, which is the most underestimated factor of all.

However, not everyone has the same predominant cause. On oily skin, the goal may be to manage sebum and congestion; on mature skin, the loss of support around the follicle matters more. Applying the same poreless promise to both oversimplifies things. If the problem is surface buildup, an enzyme peel may make sense; if it is elasticity, it does not.

The problem with poreless images

Social media and beauty photography have accustomed us to texture-free faces. Filters, image compression, frontal lighting, and retouching remove precisely the details that belong to real skin.

Comparison therefore becomes impossible: we ask a cosmetic product to reproduce an effect that was often achieved with software.

Even in instrumental tests, we need to look at how the change is measured. The number of visible pores, area, apparent depth, and photographic assessment are not the same thing. Saying “reduces pores” without declaring the method leaves a great deal open to interpretation for the reader.

My take

If a feature bothers us, it is legitimate to try to improve it: I am not here to say that pores must be liked no matter what.

But I would like to shift the question. Not “How do I close them?” but “Why are they more visible now?” From there, we can work on sebum, surface, elasticity, and photoprotection, with much more realistic expectations and without being harsh on skin that does not need it.