Do you see small dark dots on your nose and immediately think they're blackheads? That's not always the case. They could also be sebaceous filaments, structures naturally present in the pores and particularly visible on the T-zone.
Confusion is common, even though these two conditions are not treated in exactly the same way. Before piling on patches, scrubs, or extractions, here's how to tell them apart and build a gentler K-beauty routine.
What is a blackhead?
A blackhead, also known as an open comedo, is a type of blemish. It appears when a follicle fills with sebum and dead skin cells. The part exposed to the air oxidizes and turns dark: so it's not dirt.
Blackheads can appear on the nose, chin, forehead, or other areas prone to blemishes. They are often darker, more isolated, and slightly more noticeable to the touch than sebaceous filaments.
What is a sebaceous filament?
Sebaceous filaments are part of the skin's normal function, allowing sebum to reach the surface. Everyone has them, but they are more apparent when the skin produces a lot of sebum or when the pores are naturally visible.
They generally look like small grey, beige, or yellowish dots, fairly flat and evenly distributed on the nose or chin. Unlike a blackhead, a sebaceous filament is not an acne lesion and cannot be permanently removed. Even after extraction, it will fill up again.
Blackheads and sebaceous filaments: the main clues
A blackhead is generally dark, more pronounced, and present irregularly. A sebaceous filament is often lighter, smaller, and evenly distributed over a sebum-rich area.
This distinction is not always obvious to the naked eye. The goal, therefore, is not to squeeze every pore to check its contents, but to adopt a regular routine that limits sebum buildup without irritating the skin.
Yoonah's tip
If the small dots return quickly after being squeezed, they are probably sebaceous filaments. Avoid extracting them constantly: you are more likely to cause redness and make the area more sensitive. Aim to make their appearance more discreet, not to achieve a nose completely free of pores.
Three Korean products to incorporate into a targeted routine
1. Beauty of Joseon Ginseng Cleansing Oil: to remove oil-based impurities in the evening
The Beauty of Joseon Ginseng Cleansing Oil is a first cleansing step when you wear makeup or sunscreen. Its base contains soybean oil, as well as sunflower, olive, and ginseng seed oils.
Apply it to dry skin with dry hands, massage gently without focusing on the nose, then add a little water to emulsify it. The oil then becomes milky and can be rinsed. It helps dissolve oily residue, but it should not be presented as a way to permanently remove sebaceous filaments.
Our opinion on the texture: its oily texture provides a good glide and prevents friction during makeup removal. After careful emulsification, it rinses without requiring a prolonged massage.
For which skin types? It can suit all skin types looking for a first cleanser, especially normal, combination, or dry skin. A very reactive skin should, as always, introduce the product gradually and monitor its tolerance.
2. COSRX Low pH Good Morning Gel Cleanser: for water-based cleansing
The COSRX Low pH Good Morning Gel Cleanser can be used alone or after the cleansing oil. Its formula contains cleansing agents, allantoin, tea tree essential oil, and beta-salicylate.
A small amount is enough. Lather the gel between your hands, briefly massage your face, then rinse with lukewarm water. An effective cleanse should not leave the skin tight or "stripped".
Our opinion on the texture: the gel turns into a light foam and rinses easily. It provides a fresh sensation appreciated by some skin types, but the tea tree essential oil may not suit very reactive skin.
For which skin types? We would recommend it mainly for normal, combination to oily, or blemish-prone skin. If your skin is dry or sensitive and feels tight after rinsing, reduce the frequency or choose an even gentler cleanser.
3. COSRX BHA Blackhead Power Liquid: for gradual exfoliation
The COSRX BHA Blackhead Power Liquid is a leave-on exfoliating treatment formulated with beta-salicylate. It also contains niacinamide, panthenol, and sodium hyaluronate. It can help limit the buildup of dead skin cells and sebum that promotes comedones.
Apply it after cleansing, with your hands or a cotton pad, then follow with a moisturizer. Once or twice a week is enough to start. Increase only if your skin tolerates it well and it remains useful.
Our opinion on the texture: its lotion is fluid, slightly slippery, and closer to an essence than a thick peel. It leaves a little absorption time before applying the cream.
For which skin types? It is particularly interesting for combination to oily skin prone to blackheads and clogged pores. Dry or sensitive skin can use it more occasionally, only on the T-zone. In case of irritated or weakened skin, it is better to wait until it regains its comfort.
A simple routine against visible blackheads
In the evening, start with the Beauty of Joseon oil if you need to remove makeup or sunscreen. Emulsify it properly, then use a small amount of the COSRX gel. On exfoliation evenings, then apply the BHA to clean skin and finish with a moisturizer.
It is not necessary to use the BHA every day. Also avoid combining it the same evening with another powerful exfoliant, a scrub, or a retinoid when you are starting. In the morning, apply a suitable sunscreen.
If you wear neither makeup nor long-lasting sunscreen, the cleansing oil is not mandatory every evening. Always adapt the number of steps to what you actually need to remove.
The mistakes that can make pores more visible
Squeezing your nose regularly
Repeated extraction can cause redness, marks, and inflammation. Above all, it offers only a temporary result on sebaceous filaments, since they are part of the normal function of the follicle.
Using too many actives at the same time
A purifying cleanser, an exfoliating toner, a serum with acids, and a retinoid do not necessarily produce better results when layered. On the contrary, irritation can make the skin texture more uneven.
Trying to "close" pores
Pores do not open and close like doors. A consistent routine can make their appearance less pronounced by limiting the buildup of sebum and dead skin cells, but it does not permanently change their structure.
Neglecting hydration
Oily skin can also lack water. A light and suitable cream helps maintain skin comfort, especially when the routine contains an exfoliant.
Can sebaceous filaments really be made to disappear?
No, and it is not necessary: they are naturally present in the follicles. A regular routine can, however, make them less visible by controlling excess sebum and preventing buildup on the skin's surface.
For blackheads, consistency matters more than aggressive extraction. An appropriate cleanse, gradual exfoliation, hydration, and sunscreen form a more reasonable foundation than solutions that claim to transform pores in a single use.
If you have many inflammatory blemishes, painful lesions, or persistent marks, a dermatologist can offer you appropriate care.
In summary
Blackheads are open comedones, while sebaceous filaments are normal structures that carry sebum to the skin's surface. The former can be treated gradually; the latter can only become less visible.
A properly emulsified oil, a suitable water-based cleanser, and a BHA used in moderation constitute a simple routine. The most important thing remains to avoid repeated extractions and over-exfoliation: your skin does not need to be attacked to look clearer.