Blackheads and whiteheads are both clogged pores, but they differ in one key way: whether the pore stays open or closed at the surface. A blackhead is an open pore where the clog is exposed to air. A whitehead is a closed pore where a thin layer of skin traps the clog underneath. That single structural difference explains why they look different, feel different, and sometimes need different treatment approaches.
How Each One Forms
Both blackheads and whiteheads start the same way. Your skin naturally produces an oily substance called sebum, which keeps your skin moisturized. Sebum travels up through hair follicles (pores) to reach the surface. When dead skin cells mix with sebum inside a pore, the mixture can form a plug that blocks the opening. At this stage, the clogged pore is called a comedone, and it’s considered a non-inflammatory acne lesion, meaning there’s no redness, swelling, or infection involved yet.
What happens next depends on the pore’s opening. If the pore remains open at the surface, you get a blackhead. If the pore closes over and seals the plug beneath a thin layer of skin, you get a whitehead. Whiteheads typically appear as small, skin-colored or slightly white bumps without a visible opening. Blackheads have a noticeably dilated pore with a dark dot at the center.
Why Blackheads Look Dark
The color of a blackhead has nothing to do with dirt. Sebum naturally contains traces of melanin (the pigment in your skin) and fatty molecules like squalene. When that mixture sits at the top of an open pore, it reacts with oxygen in the air through a process called oxidation. This chemical reaction turns the sebum yellow, brown, or black over time. The longer the plug sits exposed, the darker it gets. Whiteheads don’t undergo this color change because the skin covering the pore blocks air from reaching the plug inside.
How They Feel and Where They Appear
Blackheads are usually flat or only slightly raised. You can see the dark center clearly, and they tend to cluster in areas with high oil production: the nose, chin, and forehead. They’re painless unless you press on them.
Whiteheads sit a bit higher on the skin’s surface because the trapped material pushes upward against the closed pore. They feel like small, firm bumps and can appear anywhere on the face, as well as on the chest, back, and shoulders. Because the plug is sealed in, whiteheads are more likely than blackheads to progress into red, inflamed pimples.
When Comedones Turn Into Pimples
On their own, both blackheads and whiteheads are non-inflammatory. But whiteheads carry a higher risk of escalation. The closed environment traps bacteria inside the pore, and as those bacteria multiply, they trigger an immune response. White blood cells flood in, the surrounding tissue swells, and what was a quiet bump becomes a red papule or a pus-filled pustule.
There’s also a chemical pathway at work. The squalene in sebum can break down into compounds that directly irritate the pore lining and stimulate inflammation. These breakdown products cause skin cells to multiply faster inside the follicle, worsening the blockage and fueling a cycle of clogging and irritation. This is one reason why even mild comedonal acne benefits from early treatment: catching it at the blackhead or whitehead stage can prevent the painful, inflamed lesions that follow.
Treatment Options That Work for Both
Because blackheads and whiteheads share the same underlying cause (excess sebum and dead skin cells plugging a pore) they respond to many of the same treatments. The goal is to speed up skin cell turnover so plugs don’t form, or to dissolve existing clogs.
Salicylic acid is one of the most widely available options. It’s oil-soluble, meaning it can penetrate into the pore and break apart the mix of sebum and dead cells from the inside. You’ll find it in cleansers, toners, and spot treatments at most drugstores.
Retinoids are considered the gold standard for comedonal acne. They work by accelerating how quickly your skin sheds dead cells, preventing them from accumulating inside pores. In clinical studies, 12 weeks of retinoid use reduced the number of early-stage comedones by 35 to 80 percent, depending on the formulation and strength. Results take time, so most dermatologists recommend sticking with a retinoid for at least three months before judging whether it’s working. Some retinoids are available over the counter (adapalene is the most common), while stronger versions require a prescription.
Other effective ingredients include benzoyl peroxide, which kills bacteria and helps prevent whiteheads from becoming inflamed, azelaic acid, and glycolic acid, which exfoliates the skin’s surface to keep pores clear.
Why Squeezing Usually Makes Things Worse
Blackheads are tempting to squeeze because you can see the dark plug sitting right there. Whiteheads are tempting because they look like they’re about to pop. In both cases, using your fingernails to force the contents out puts uneven pressure on the surrounding skin, which can tear tissue, push bacteria deeper into the pore, and trigger inflammation or infection. The result is often a red mark or dark spot that lasts far longer than the original blemish would have.
If you want extraction done safely, dermatologists use a small metal tool called a comedone extractor that applies even, controlled pressure around the pore. This removes the entire plug with minimal tissue damage and a lower chance of the comedone returning.
Preventing New Ones From Forming
The biggest controllable factor is what you put on your skin. Skincare and cosmetic ingredients are rated on a comedogenicity scale from 0 (won’t clog pores) to 5 (very likely to clog pores). If you’re prone to blackheads or whiteheads, check ingredient lists and avoid products where high-scoring ingredients appear near the top of the label. Common offenders include certain algae extracts, wheat germ oil, and sodium lauryl sulfate, all rated 5 out of 5 for pore-clogging potential. Sticking with products labeled “non-comedogenic” is a reasonable shortcut, though the term isn’t regulated, so scanning the actual ingredients is more reliable.
Beyond product choice, a few habits make a meaningful difference. Washing your face twice daily with a gentle cleanser removes excess oil before it can accumulate. Changing pillowcases frequently keeps oil and dead skin from transferring back to your face overnight. And if you use a retinoid or salicylic acid regularly, applying sunscreen during the day protects the fresh skin underneath, since both ingredients can increase sun sensitivity.