Blackheads keep coming back because your skin is continuously producing oil, and certain factors in your body, your environment, and your routine can accelerate that process or make it harder for oil to exit your pores cleanly. Understanding what’s driving the cycle is the first step to breaking it.
How Blackheads Actually Form
Your skin produces an oily substance called sebum, which normally travels up through your pores to moisturize the surface. A blackhead forms when sebum and dead skin cells clump together and partially block a pore, creating a plug that sits at the opening. Because the plug is exposed to air, it oxidizes and turns dark. That dark color isn’t dirt. It’s a chemical reaction, the same way a sliced apple browns when left on the counter.
This is what separates a blackhead from a whitehead. A whitehead is a plug that completely seals the pore, trapping everything underneath a thin layer of skin. A blackhead is an open plug, sitting right at the surface, which is why it looks like a tiny dark dot.
Your Hormones Are Likely the Biggest Factor
The oil glands in your skin are directly controlled by androgens, a group of hormones that includes testosterone. Your skin cells convert testosterone into a more potent form called DHT, and research has shown that acne-prone skin produces 2 to 20 times more DHT than skin in the same area on someone without acne. That’s a massive difference in the signal telling your oil glands to ramp up production.
This is why blackheads tend to cluster in certain life stages. Puberty, menstrual cycles, pregnancy, and perimenopause all involve hormonal shifts that can spike androgen activity. In women, adrenal hormones also contribute to the process, which is why stress (which triggers adrenal output) can worsen breakouts even when nothing else has changed. If you notice your blackheads flare on a predictable schedule, hormones are almost certainly involved.
What You’re Eating May Play a Role
High-glycemic foods, things that spike your blood sugar quickly like white bread, sugary drinks, and processed snacks, appear to change the composition of your skin’s oil. A clinical trial published in the Journal of Dermatological Science found that people who switched to a low-glycemic diet for 12 weeks saw a measurable shift in the fatty acid makeup of their sebum. Specifically, their oil had a higher ratio of saturated to monounsaturated fatty acids, and this shift correlated with fewer acne lesions. The researchers also found that increased oil flow was associated with higher levels of monounsaturated fats in sebum, suggesting that what you eat can change not just how much oil you produce but how pore-clogging that oil is.
This doesn’t mean sugar causes blackheads in every person. But if you’re eating a diet heavy in refined carbohydrates and struggling with persistent blackheads, it’s worth experimenting with swapping in whole grains, vegetables, and proteins for a few weeks to see if anything changes.
Air Pollution Oxidizes Your Skin’s Oil
Your sebum contains a compound called squalene, which sits on the surface of your skin and is one of the first things exposed to environmental pollutants. Ozone, heavy metals like lead and nickel, and particulate matter from traffic and industry all trigger a chain reaction that breaks squalene down into irritating byproducts. Research published by the American Chemical Society showed that these pollutants kick off a process called lipid peroxidation, where oxygen atoms are forced into the fat molecules on your skin, creating reactive compounds that can irritate pores and promote clogging.
If you live in a city or near a busy road, this is one more reason your blackheads may be persistent even when your skincare routine seems solid. Cleansing at the end of the day to remove surface pollutants becomes more important in these environments.
You Might Be Looking at Sebaceous Filaments
Before overhauling your routine, it’s worth checking whether what you’re seeing are actually blackheads. Sebaceous filaments are a normal part of your skin’s structure. They look like tiny dots on your nose and chin, but they’re smaller, flatter, and lighter than blackheads, typically gray, light brown, or yellowish rather than truly dark. They aren’t acne. They don’t involve a plug blocking the pore. Oil flows freely through them.
The key visual difference: blackheads are raised bumps with a distinctly dark center, like a speck of dirt sitting in the pore. Sebaceous filaments are flat and uniform. If you squeeze a sebaceous filament, a thin, waxy thread comes out. If you squeeze a blackhead, a dark, solid plug pops free. Sebaceous filaments refill within about 30 days no matter what you do, because they’re just part of how your skin moves oil to the surface. Trying to eliminate them is a losing battle and can damage your skin.
Why Squeezing Makes It Worse
It’s tempting to extract blackheads yourself, but squeezing or picking pushes bacteria deeper into the pore and can rupture the follicle wall beneath the skin’s surface. This turns a simple clogged pore into an inflamed, potentially infected lesion. It can also trigger post-inflammatory hyperpigmentation, a dark mark that lingers for weeks or months after the original blackhead is gone. The irony is that the damage from squeezing often looks worse and lasts longer than the blackhead itself would have.
What Actually Clears Them
The most effective approach for recurring blackheads targets two things: keeping dead skin cells from accumulating inside the pore, and reducing excess oil.
Salicylic acid is the go-to ingredient because it’s oil-soluble, meaning it can dissolve into the sebum inside a pore and break up the plug from within. Glycolic acid and lactic acid work on the surface level, loosening the dead cells that contribute to the blockage. How often you should use these depends on your skin type. If your skin is oily, two to three times a week is a reasonable starting point and you may be able to increase from there. If your skin is dry or sensitive, once a week or even every other week is safer. Combination skin generally tolerates twice-weekly use. If you notice redness, peeling, or increased breakouts, scale back.
Retinoids, available both over the counter and by prescription, speed up skin cell turnover so dead cells are less likely to accumulate and form plugs. They’re effective but take patience. You won’t see results for eight to twelve weeks with consistent use, and full clearance of stubborn blackheads can take several months.
One important point: no product prevents blackheads permanently after you stop using it. Because the underlying drivers (oil production, hormonal fluctuations, cell turnover rate) are ongoing, blackhead management is a maintenance game. The goal is a simple, consistent routine that keeps pores clear over time rather than a one-time fix.
Habits That Quietly Contribute
Several everyday habits create conditions for blackheads to keep forming. Heavy, oil-based moisturizers and foundations can sit in pores and mix with sebum, essentially creating a plug from the outside. Look for products labeled noncomedogenic, which means they’ve been formulated to avoid blocking pores. Sleeping in makeup is one of the fastest ways to guarantee clogged pores by morning.
Touching your face transfers oil and bacteria from your hands directly into pores. Phone screens pressed against your cheek do the same. Pillowcases absorb sebum night after night, so switching them every few days can make a noticeable difference, especially if you sleep on your side. Overwashing is another trap. Stripping your skin with harsh cleansers triggers a rebound effect where oil glands compensate by producing even more sebum, making the problem worse. A gentle cleanser twice a day is enough for most people.