Blackheads and whiteheads are both forms of comedonal acne, and they form the same way: a pore becomes clogged with a combination of excess sebum and dead skin cells. The difference between them comes down to one thing: whether the pore stays open or closes over.

That single distinction changes how each one looks, how it behaves, and how you approach treating it.

What Is a Blackhead?

A blackhead is an open comedone. The pore becomes partially blocked, but the opening at the surface stays exposed to air. When the sebum and dead skin cell mixture inside oxidizes on contact with oxygen, it turns dark. That dark color is not dirt. It is the same oxidation process that browns a sliced apple.

Blackheads typically appear as small, flat, dark dots sitting at the skin's surface. They are most common in the T-zone, particularly on the nose, chin, and forehead, where sebaceous glands are most active and pores tend to be larger.

Because the pore stays open, blackheads are generally not painful and do not become inflamed on their own. They can, however, become more deeply embedded over time if congestion builds without consistent routine maintenance.

What Is a Whitehead?

A whitehead is a closed comedone. The same buildup of sebum and dead skin cells forms inside the pore, but a thin layer of skin grows over the opening and seals it shut. Because the contents have no contact with air, oxidation does not occur, and they stay white, cream, or flesh-colored.

Whiteheads typically appear as small raised bumps just under the skin's surface. They tend to feel slightly firmer than the surrounding skin and can appear anywhere on the face, chest, or back.

Because the pore is sealed, whiteheads are more prone to becoming inflamed than blackheads. If bacteria multiply inside a closed comedone, it can progress into a red, tender papule or pustule. This makes treating whiteheads promptly more important than it might seem.

How They Compare

What Causes Both

The underlying cause is the same for both: a combination of excess sebum production and dead skin cells that are not shedding fast enough. Several factors contribute:

Genetics. Pore size and oil production are largely inherited. Some skin types are simply more prone to comedonal congestion than others.

Hormonal fluctuations. Hormones directly influence sebum production. This is why comedonal acne is common during puberty, the menstrual cycle, and perimenopause.

Slow cell turnover. When dead skin cells accumulate at the surface rather than shedding normally, they combine with oil inside the follicle to form a plug.

Incomplete cleansing. Sunscreen, tinted moisturizers, and foundation are designed to stay on skin. If they are not fully removed at the end of the day, they mix with sebum and dead skin inside the pore, contributing to congestion in both forms.

Pore-clogging products. Certain ingredients in skincare and makeup, including heavy silicones, certain waxes, and coconut oil, can contribute to congestion. The term "non-comedogenic" is not regulated, so any brand can use it regardless of what is actually in the formula. At Art of Skin Care, products that have been vetted as safe for acne-prone skin carry an Acne Safe badge. That is the marking to look for.

How to Treat Blackheads

Blackheads respond well to consistent home care. The most effective approach addresses both the existing congestion and the conditions that created it.

Double cleansing in the evening is foundational, particularly if you wear sunscreen or any tinted product during the day. An oil-based first cleanse removes what water-based cleansers cannot.

Glycolic acid is our preferred acid for treating compacted blackheads. It loosens the bonds between dead skin cells and softens the sebum plug, allowing it to release more easily from the pore. For clients with more sensitive skin, mandelic or azelaic acid offer a gentler alternative with similar exfoliating benefits.

Retinol normalizes cell turnover and reduces sebum production over time, addressing both sides of the blackhead cycle. Results are cumulative: most clients see a meaningful difference at six to eight weeks of consistent use.

Professional extraction by a licensed esthetician is the most effective way to clear deeply embedded blackheads. Proper technique, skin prep, and post-care make professional extraction significantly safer and more effective than extraction at home. Read: How to Extract Blackheads Safely

Full treatment guide: How to Get Rid of Blackheads

How to Treat Whiteheads

Because whiteheads are closed, they require a slightly different approach than blackheads.

Retinol is the most important ingredient here. By normalizing cell turnover, it prevents the dead skin cell buildup that allows the pore opening to close over in the first place. It is the single most effective topical ingredient for both preventing and clearing closed comedones.

Gentle exfoliation with a mandelic or azelaic acid toner helps keep dead skin cells shedding at a healthy rate, reducing the likelihood of pore closure. Avoid aggressive physical scrubbing, which can irritate the skin and trigger more congestion.

Avoid picking or squeezing. Because whiteheads are sealed under the skin, applying pressure without proper preparation increases the risk of rupturing the follicle wall, pushing the clog deeper, and causing post-inflammatory hyperpigmentation or scarring.

Acne-safe products throughout your routine. Whiteheads are particularly sensitive to pore-clogging ingredients because once the pore closes over, congestion has nowhere to go. Auditing your full routine, including moisturizer, SPF, and makeup, is often the most impactful step for clients dealing with persistent closed comedones.

When It Might Be Something Else

Not everything that looks like a blackhead or whitehead is one. If you are seeing small, uniform, grayish dots on your nose that seem impossible to clear no matter what you try, they may be sebaceous filaments rather than blackheads. Sebaceous filaments are a normal part of skin anatomy and cannot be permanently removed. Read the full explanation: Sebaceous Filaments vs. Blackheads

For a deeper understanding of what drives both blackheads and whiteheads at the pore level, including why they become more visible with age, read: Everything You Need to Know About Pores.