Understanding Pores & Blackheads

A pore is the opening of a hair follicle where skin oil comes out; it does not open or close. Extra oil, built-up dead skin, age and genes make pores look larger, and oil that collects and darkens becomes a blackhead. No product changes a pore's real size, but less oil and less clogging can make pores less noticeable.

Written by the Oliareen editorial teamDermatologist review: pendingLast updated: 6 November 2026How we write

What a pore is

Each pore is the opening of a hair follicle and oil gland. Pores have no muscles, so hot water does not "open" them and cold water does not "close" them. Studies found oil output is most closely linked with pore size; age, being male and ethnic background also play a part.

Blackheads and sebaceous filaments

Blackhead: oil and dead skin plug a pore that stays open, and the surface darkens in air. It is not dirt; it is a mild form of acne.
Sebaceous filaments: small grey-brown dots on the nose; squeezing pushes out a whitish thread of oil that refills within days. This is normal, not a problem.

What can contribute

Extra oil, especially in hot, humid months.
Built-up dead skin.
Skin losing firmness with age.
Long-term sun damage.
Squeezing and picking, which stretch pores and leave marks.

What not to assume

Large pores do not mean unclean skin.
No study shows a product shrinks real pore size; it can make pores look smaller.
Not every dark dot on the nose is a blackhead.

Common mistakes

Squeezing with nails, poking with pins.
Frequent pore strips and peel-off masks; they look clean briefly but irritate.
Trying to "open and close" pores with steam and ice.
Harsh scrubs.

General skincare support

A gentle cleanser twice a day.
A light, oil-free moisturiser and sunscreen.
One exfoliating ingredient a few nights a week, started slowly.
Patience: visible change usually takes 4–8 weeks.

Ingredient evidence and limits

These can help how pores look, not their real size. Evidence is mostly small or moderate.

Salicylic acid: oil-soluble, may reduce clogging inside pores; the most common choice for blackheads.
Niacinamide: helps shine and the look of pores somewhat.
Retinol: supports skin renewal; start slowly, not in pregnancy.
AHA: lifts surface dead skin; raises sun sensitivity.

Do not start salicylic acid, AHA and retinol together.

When to see a dermatologist

Many red or painful spots along with blackheads.
Pores worry you a lot; a doctor can discuss procedure options.

Simple routine

Morning

1
Gentle cleanser, or just water
If your face is not very oily after the night, water alone is fine in the morning.
2
Light moisturiser (gel or lotion)
Helps skin hold water; lighter textures feel better in the heat.
3
Sunscreen, SPF 30 or higher
Sun deepens marks and irritates skin; about two finger-lengths for face and neck, reapply every 2 hours outdoors.

Evening

1
Gentle cleanser
Lifts the day's sweat, dust and sunscreen; no scrubbing needed.
2
Salicylic acid, starting 2–3 nights a week
On blackhead areas; patch test first.
3
Light moisturiser (gel or lotion)
Helps skin hold water; lighter textures feel better in the heat.

General education, not a diagnosis or treatment plan.

Questions people ask

Do pores open and close?

No. Pores have no muscles. Warm water can soften trapped oil a little and cold water gives a brief tight feeling, but pore size does not change.

Is it okay to squeeze blackheads?

Squeezing stretches pores and raises the risk of inflammation and marks. Ingredients like salicylic acid and patience are safer; if needed, a dermatologist can extract safely.

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