Blackheads vs Sebaceous Filaments: How to Tell Them Apart

Close-up of nose skin comparing sebaceous filaments and blackheads

If your nose is covered in small, flat, grayish or yellowish dots spread evenly across the skin, you're most likely looking at sebaceous filaments, not blackheads. Filaments are a normal part of your pores that carry oil to the surface. Blackheads are a type of acne: a plug of oil and dead skin sitting at the opening of a pore.

The difference matters because a common mistake is to squeeze, strip and scrub filaments as if they were acne, which irritates the skin and changes nothing for long. This guide helps you tell which one you have and treat it the right way.

Key takeaways

  • Filaments are normal: Cleveland Clinic calls them "a normal, healthy element of your skin." You can make them less visible, but you can't get rid of them.
  • Blackheads are acne: they form when oil and dead skin cells block a hair follicle, according to the NHS.
  • Squeezing backfires: filaments refill within about 30 days, and squeezing spots can irritate skin or cause scars.
  • The same ingredients help both: salicylic acid and retinoids can reduce the look of filaments and treat blackheads.
  • See a professional if over-the-counter products haven't helped or you also have deeper, painful acne.

What are sebaceous filaments?

Sebaceous filaments are thin, threadlike structures that line your oil glands and channel sebum (your skin's natural oil) up to the surface. Cleveland Clinic describes them as small, flat, light-colored spots, usually gray, light brown or yellow. They don't hurt.

They're most visible on the nose, forehead, chin and cheeks, where oil glands are busiest, but they can show up on the chest, arms and legs too. The key point is that there's no plug. Oil flows freely through a filament, which is why it looks like a faint, flat dot rather than a raised dark bump.

What are blackheads?

Blackheads are open comedones, one of the mildest forms of acne. The NHS explains that acne starts when oil and dead skin cells block hair follicles. With a blackhead, the blocked pore stays open at the surface and the plug looks black or brown. The NHS describes them as black or brown spots that are usually flat but sometimes raised.

Blackheads tend to appear in some spots rather than evenly across an area, and you may also have whiteheads or red spots nearby. Hormone changes, some medicines and greasy skin products are all listed by the NHS as possible triggers for acne.

How do you tell them apart?

FeatureSebaceous filamentsBlackheads
ColorGray, light brown or yellowDark brown or black
TextureFlat, smooth to the touchUsually flat, sometimes raised
PatternEven, across the whole nose or T-zoneScattered in spots, often with other acne
PlugNo plug, oil flows throughPlug of oil and dead skin
After squeezingRefills within about 30 daysCan come back if the pore clogs again
Is it acne?NoYes

A quick self-check: stand in good light and look at your nose from arm's length. If you see a uniform sprinkle of faint dots, those are filaments. If you see a handful of distinctly dark dots, perhaps alongside other spots, they're more likely blackheads. Many people have both.

Why does squeezing make things worse?

Pore strips, harsh scrubs and fingertips can't tell the difference between the two. Cleveland Clinic advises against squeezing filaments because it can irritate or damage your skin, and notes that pore strips may dry the skin and let bacteria in. Even if you do clear them out, the pores fill again within about a month.

With blackheads and other acne, the NHS warns not to pick or squeeze spots because it can cause scars. Repeated picking can also leave marks that take far longer to fade than the blackhead itself. If you've already overdone it, our guide on how to fix damaged sebaceous filaments covers recovery, and this piece explains what to do if a clogged pore has left a hole.

How should you treat each one?

For sebaceous filaments: aim to minimize, not remove

  1. Cleanse gently twice a day. Use a mild cleanser and remove makeup at night.
  2. Add salicylic acid. Cleveland Clinic lists over-the-counter salicylic acid cleansers or lotions as a way to make filaments less noticeable. Start a few times a week and build up if your skin tolerates it.
  3. Consider a retinoid. Retinoids can also reduce their appearance. Cleveland Clinic suggests using them every other day or with a moisturizer to limit peeling.
  4. Choose non-comedogenic products. These are less likely to clog pores.
  5. Set realistic goals. The aim is less visible filaments, not a poreless nose.

For blackheads: clear the clog and prevent new ones

  1. Use over-the-counter acne products. The NHS lists products containing salicylic acid or benzoyl peroxide, and a pharmacist can help you choose.
  2. Avoid scrubbing hard. The NHS advises against scrubbing the skin.
  3. Give it time. Most acne treatments need several weeks of steady use before you can judge them, so don't swap products every few days.
  4. Ask about prescription options. A GP or dermatologist can prescribe retinoid creams such as tretinoin or adapalene, or other treatments if your acne is more widespread.

Spots around the mouth that don't respond to acne products may be something else entirely; see perioral dermatitis vs acne around the mouth. Teens building a first routine may find our teen skincare routine guide useful.

When should you see a doctor or dermatologist?

Sebaceous filaments on their own aren't a medical problem. Get advice from a GP or dermatologist if:

  • You've treated your skin yourself for a while and it isn't improving
  • You have many spots, or spots that are deep, painful or leaving scars
  • Skin looks hot, swollen and red, which can signal infection
  • Filaments come with more severe acne elsewhere
  • Your skin is affecting your mood or confidence

FAQ

Can you get rid of sebaceous filaments permanently?

No. Sebaceous filaments are a normal part of how your pores carry oil to the surface, so they always come back. Cleveland Clinic says pores refill within about 30 days if you squeeze them out. You can make them less noticeable with gentle cleansing, salicylic acid and retinoids, but the goal is management, not removal.

Do pore strips work on blackheads?

Pore strips can pull out the top of a plug, so your nose may look clearer for a short time. They don't stop pores from clogging again, and Cleveland Clinic notes they may dry out skin and let bacteria in. Salicylic acid and retinoids are better long-term choices. If you do use strips, use them sparingly and never on irritated skin.

Can you have blackheads and sebaceous filaments at the same time?

Yes, and it's common. Most people have filaments across the nose and T-zone, and some will also have a few blackheads scattered among them. Darker, distinct dots are more likely to be blackheads. Because salicylic acid and retinoids help both, a simple routine built around them can improve the look of your skin either way.

What to do next

  1. Check your nose in good light and decide whether you see an even sprinkle of faint dots or a few dark plugs.
  2. Put away pore strips and stop squeezing for at least a month.
  3. Start a gentle cleanser plus a salicylic acid product two or three times a week.
  4. See a pharmacist, GP or dermatologist if things haven't improved after a couple of months or you have painful spots.

This article is for general information and is not medical advice.

Last reviewed: October 2026.

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