Open, Closed... WTH Are Comedones?

If you’ve ever fallen down a late-night skincare rabbit hole on TikTok or Reddit, chances are you’ve stumbled across the word “comedones” (pronounced com-uh-dohns).

It sounds like a complex medical condition, but in reality, you’ve likely seen them on your own skin dozens of times.

So, what on earth are comedones? Why do they come in "open" and "closed" varieties? And most importantly, how do you get rid of them without ruining your skin barrier? Let’s break it all down.

The Short Answer: What Is a Comedone?

In plain English, a comedone is simply a clogged pore.

It’s the technical term for a small bump on the skin caused by a buildup of three main culprits:

1. Excess Sebum (Oil): Produced naturally by your sebaceous glands.

2. Dead Skin Cells: Which fail to shed properly and get trapped inside the follicle.

3. Product Residue or Dirt: Makeup, heavy creams, or environmental pollution.

When this mixture gets stuck inside your pore, a comedone is born. Comedones are considered non-inflammatory acne—meaning they don't feature the red, painful, pus-filled swelling associated with regular pimples (unless bacteria gets involved later).

The Two Main Types: Open vs. Closed Comedones

Comedones generally fall into two distinct categories based on whether the top of the clogged pore is exposed to the air or sealed shut.

             ┌────────────────────────┐
             │       COMEDONES        │
             │     (Clogged Pores)    │
             └───────────┬────────────┘
            │
            ┌─────────────────┴─────────────────┐
            ▼                                   ▼
┌───────────────────────┐           ┌───────────────────────┐
│     OPEN COMEDONES    │           │    CLOSED COMEDONES   │
│      (Blackheads)     │           │      (Whiteheads)     │
├───────────────────────┤           ├───────────────────────┤
│ • Pore top is OPEN    │           │ • Pore top is CLOSED  │
│ • Air oxidizes oil    │           │ • Trapped under skin  │
│ • Turns dark/black    │           │ • Small flesh/white   │
│ • Lies flat on skin   │           │   colored bump        │
└───────────────────────┘           └───────────────────────┘

1. Open Comedones (A.K.A. Blackheads)

• What they look like: Tiny dark brown or black dots resting on the skin’s surface, most common around the nose, chin, and forehead (the T-zone).

• Why they are open: The pore opening remains wide open at the surface of the skin.

• Why they turn black: It’s not dirt! When the trapped mixture of oil and dead skin cells hits the oxygen in the air, a natural chemical reaction called oxidation turns the plug dark brown or black.

2. Closed Comedones (A.K.A. Whiteheads or Textured Bumps)

• What they look like: Small, raised, skin-colored or whitish bumps. They don't usually hurt, but they make the skin surface feel bumpy or uneven under lighting.

• Why they are closed: A thin layer of skin grows over the top of the pore, completely sealing the clog inside.

• Why they stay pale: Because oxygen cannot reach the trapped oil, oxidation never happens, so the spot retains its pale or flesh-toned appearance.

Note: Closed comedones are often confused with Milia (tiny keratin cysts under the skin) or Fungal Acne (small, itchy bumps caused by yeast overgrowth). If your bumps are uniform, super itchy, or won't budge with normal skincare, it’s worth consulting a dermatologist!

What Causes Comedones to Form?

While anyone can get comedones, a few common factors increase your chances of developing them:

• Overactive Sebaceous Glands: Producing more natural oil than your pores can handle (common during puberty, hormonal shifts, or stress).

• Sluggish Exfoliation: Your skin isn't shedding dead skin cells efficiently, causing them to stack up inside the pore.

• Comedogenic Products: Using heavy oils, rich waxes, or thick silicones in cosmetics and skincare that trap debris.

• Picking & Squeezing: Constantly touching your face or squeezing skin can irritate pore walls, causing them to collapse and clog more easily.

How to Treat & Prevent Comedones Like a Pro

The key to clearing both open and closed comedones is gentle, consistent exfoliation and pore protection. Here’s your game plan:

1. Use Salicylic Acid (BHA)

Salicylic acid is oil-soluble, meaning it can travel deep inside the pore to dissolve the glue holding dead skin and oil together. It's the gold-standard ingredient for clearing out both open blackheads and closed whiteheads.

2. Incorporate Retinoids

Topical retinoids (like Adapalene, Retinol, or Tretinoin) speed up cellular turnover. By training your skin to shed dead cells faster, retinoids stop pores from getting blocked in the first place.

3. Protect with Hydrocolloid Patches

When a comedone turns into an active spot, or if you have a surface-level bump that's tempting you to pick, pop a Hydrocolloid Patch over it.

• It absorbs excess fluid and oil overnight.

• It keeps your hands away from the spot, preventing scarring and infection.

4. Switch to Non-Comedogenic Products

Look for labels on your moisturizers, sunscreens, and foundations that explicitly say "non-comedogenic" or "oil-free."

What NOT to Do

• ❌ Don't use harsh physical scrubs: Rough walnut or apricote scrubs micro-tear the skin and cause inflammation, making comedones worse.

• ❌ Don't squeeze closed comedones: Because they are sealed under skin, squeezing them will tear the surrounding tissue, leading to inflammatory acne and permanent scars.

• ❌ Don't over-wash your face: Washing more than twice a day strips natural moisture, causing skin to produce more oil in panic mode.

Final Thoughts

Now you know! Comedones are simply clogged pores, split into open (blackheads) and closed (whiteheads). They are a totally normal part of having human skin, and with a clean routine featuring BHA, retinoids, and targeted hydrocolloid patches, you can easily keep them under control.