Genetics
Your underlying follicular anatomy and skin type influence how visible pores naturally appear.
Santi Journal · Skin Health
Pollution, Enlarged Pores & Skin Ageing
What London air can — and cannot — do to your skin.
Pollution does not literally “open” your pores. But environmental exposure can contribute to oxidative stress, inflammation and changes in skin barrier function — factors that may make texture, congestion and pores appear more noticeable.
Environmental skin ageing
What does pollution actually do to skin?
Urban air contains a complex mixture of environmental pollutants, including particulate matter, nitrogen oxides, ozone and other airborne compounds.
Skin is one of the body's interfaces with the external environment. Exposure to pollutants has been studied in relation to oxidative stress, inflammatory pathways, barrier disturbance and signs of extrinsic skin ageing.
That does not mean every skin problem in London is caused by pollution. Genetics, UV exposure, hormones, sebum production, skincare, age and lifestyle all matter.
Pollution may contribute to:
- Oxidative stress
- Inflammatory signalling
- Skin barrier disturbance
- Changes in skin surface condition
- Extrinsic skin ageing
- Greater visibility of existing texture concerns
Why city living can show up in your skin
The relationship isn't as simple as “pollution causes large pores”. Several processes can overlap.
01
Urban Exposure
Particulate matter, gases, UV and other environmental stressors.
02
Skin Stress
Oxidative and inflammatory pathways may be increased.
03
Barrier & Surface
Barrier function, sebum, congestion and skin comfort may be affected.
04
Visible Texture
Existing pores, unevenness and signs of ageing may become more noticeable.
Why do some pores look larger than others?
What we commonly call a “pore” is the visible opening associated with a hair follicle and sebaceous gland. Its appearance is influenced by several factors.
Sebum
Greater oil production can be associated with more prominent-looking follicular openings.
Congestion
Accumulated sebum and keratin within a follicle can make its opening appear more obvious.
Skin elasticity
Structural support around the follicle matters. Changes in elasticity with age can influence pore appearance.
Sun exposure
Cumulative UV exposure contributes to structural skin ageing and can make texture concerns more apparent.
Skin condition
Dehydration, barrier disturbance and surface texture can alter how light reflects from skin, affecting how noticeable pores appear.
A common question
Can you actually shrink a pore?
Not in the sense of permanently closing or erasing it.
A pore is an anatomical structure. But its
visible appearance can often be reduced
by addressing the factors making it look prominent — such as
excess sebum, congestion, uneven surface texture or loss of
structural support.
Large-looking pores aren't always an oily-skin problem
Younger / oilier skin
In younger skin, prominent pores are often discussed in relation to sebum production and congestion.
Where this is genuinely the issue, appropriate cleansing, salicylic acid and selected professional treatments may help reduce their visible appearance.
Ageing skin
As skin ages, collagen and elastic support change. Reduced structural support around follicles can contribute to pores appearing more prominent even when excessive oil is not the main problem.
This is why treating every visible pore with stronger exfoliation doesn't necessarily make sense.
Measure the skin before deciding what it needs
Two people can both complain about “large pores” while having very different skin. Objective measurements can help us distinguish between oiliness, dehydration, impaired barrier function and structural change.
| What we find | What it may suggest | Possible strategy |
|---|---|---|
| Higher sebum | Oil production may be contributing to pore visibility | Appropriate cleansing, salicylic acid and selected peels |
| Congestion | Follicular build-up may be exaggerating pore appearance | Exfoliation and appropriate professional facial treatment |
| Low hydration | Surface quality may be making texture appear more obvious | Hydration and barrier-support strategy |
| Higher TEWL | Barrier function may be compromised | Barrier support rather than aggressive exfoliation |
| Reduced elasticity | Structural ageing may be contributing | Consider collagen and skin-remodelling strategy |
| Mixed findings | More than one factor is involved | A combined, staged treatment plan |
A sensible London anti-pollution routine
You don't need a shelf full of products labelled “anti-pollution”. A well-designed basic routine is generally a better starting point.
Antioxidant
Vitamin C or another well-formulated antioxidant can complement your broader environmental skin-protection strategy.
Broad-Spectrum SPF
UV remains one of the major avoidable drivers of extrinsic skin ageing. Daily sun protection matters.
Cleanse
Remove sunscreen, make-up, excess sebum and material accumulated on the skin during the day without aggressively stripping the barrier.
Treat intelligently
Retinoids, salicylic acid or other actives may be useful depending on your skin — but more exfoliation is not automatically better.
Where does salicylic acid fit in?
Why it can be useful
Salicylic acid is particularly relevant where excess sebum and follicular congestion contribute to visible pores.
It can be incorporated through appropriate homecare or selected professional peel protocols.
When it isn't the whole answer
If the primary issue is dehydration, barrier dysfunction or loss of elasticity, repeatedly increasing acid strength may irritate the skin without addressing the main reason pores look prominent.
Treatment should follow the skin problem rather than the marketing label on the product.
Professional options for texture & visible pores
There is no universal “pore treatment”. The appropriate option depends on what is driving the appearance.
Chemical Peels
Selected superficial peels may help where oiliness, congestion or uneven surface texture are significant factors.
Microneedling
Where texture and structural skin quality are more relevant, collagen-stimulating approaches may form part of the treatment plan.
Skin Polishing
Professional exfoliation can improve surface smoothness and may be useful where dullness and superficial build-up are contributing.
Skin Lab
Useful when you're not sure whether the problem is oil, dehydration, barrier function, elasticity — or several things at once.
Retinoid Strategy
Where appropriate and tolerated, retinoids can form part of a long-term strategy for texture and photoageing.
Laser & Devices
For selected patients with more significant texture or photoageing, device-based treatments may be considered after assessment.
Avoid the pore-treatment trap
What we wouldn't recommend
Don't
- Scrub aggressively because pores look large
- Assume every visible pore means oily skin
- Use increasingly strong acids without a reason
- Strip the skin with harsh cleansers
- Expect a product to permanently “close” pores
Do
- Use broad-spectrum SPF consistently
- Cleanse thoroughly but gently
- Treat congestion when congestion actually exists
- Support hydration and barrier function
- Consider elasticity and structural ageing as well as oil
Pollution & Enlarged Pores FAQs
Does pollution actually enlarge pores?
It is more accurate to say that pollution may contribute to oxidative stress, inflammation and changes in skin condition that can make existing texture and pores more noticeable. Pore appearance is also strongly influenced by genetics, sebum, congestion, age and structural support.
Can pores open and close?
Not in the way the phrase is commonly used. Pores do not contain muscles that open and close in response to hot or cold water. Their visible appearance can, however, change according to sebum, congestion, surface condition and surrounding skin structure.
Can enlarged pores be permanently shrunk?
You cannot erase the underlying follicular opening, but its visible appearance can often be improved by addressing factors such as excess oil, congestion, uneven texture or reduced structural support.
Is salicylic acid good for enlarged pores?
It can be particularly useful where excess sebum and follicular congestion are important factors. It is less logical to keep increasing exfoliation where dehydration or loss of elasticity is the principal issue.
Should I double cleanse because I live in London?
The important objective is to remove make-up, sunscreen, excess sebum and material accumulated during the day without damaging the skin barrier. Whether that requires one or two cleansing steps depends on the products you wear and your skin type.
Does vitamin C protect against pollution?
Topical antioxidants such as vitamin C can form part of a broader strategy designed to support skin against oxidative stress. They should complement — rather than replace — appropriate cleansing and daily sun protection.
Why do my pores look larger as I get older?
Changes in collagen and elasticity can reduce structural support around follicles. This can contribute to pores becoming more noticeable even when excessive oil is not the primary concern.
What is the best treatment for large pores?
There isn't one best treatment because the cause varies. Oil and congestion may call for a different strategy from dehydration, photoageing or reduced elasticity. Assessment helps determine which factor is most relevant.
Understand what your skin is telling you
Santi London · South Kensington
Don't treat the pore. Understand the skin.
If enlarged pores, congestion or changing skin texture are bothering you, the useful question is not simply how to make pores smaller — but why they are becoming more visible in the first place.
Santi Skin Lab can help distinguish between sebum, hydration, barrier function and structural skin changes so that treatment is based on what your skin actually needs.
Santi London · 33 Thurloe Street · South Kensington · London SW7 2LQ
This article is for general skin-health education and is not
intended as medical diagnosis or treatment advice.