Closed comedones are small, skin-colored or slightly white bumps that form when a pore becomes plugged beneath the surface of the skin. Unlike blackheads, which have an open surface exposed to air, closed comedones are sealed over with a thin layer of skin, trapping oil and dead skin cells inside the follicle. They’re one of the most common forms of acne and often the most stubborn to treat because the clog has no way to drain on its own.
What They Look and Feel Like
Closed comedones typically appear as small, flesh-toned, white, or slightly yellowish bumps. They’re not red or swollen like a pimple, and they don’t have a visible dark center like a blackhead. You’ll usually notice them more by texture than by color: running your fingers across your skin feels rough or bumpy, almost like sandpaper in areas where they cluster. The forehead, chin, and jawline are the most common locations, though they can appear anywhere on the face.
Because they sit just beneath the skin’s surface, closed comedones can be frustratingly invisible in photos while being very obvious to you in the mirror, especially in side lighting. They can persist for weeks or months without changing, and some eventually become inflamed, turning into the red, painful pimples most people associate with acne.
How a Closed Comedone Forms
Every pore on your face contains a tiny oil gland and a hair follicle. Under normal conditions, the gland produces oil that travels up and out of the pore, keeping your skin moisturized. Dead skin cells lining the inside of the pore shed and get carried out along with the oil.
A closed comedone forms when this process breaks down. The oil gland ramps up production, the dead skin cells become stickier than usual, and both start accumulating inside the follicle instead of exiting. The result is a solid plug that blocks the pore opening entirely. Because the plug is covered by a layer of skin, it stays sealed off from the surface. That’s what distinguishes it from a blackhead, where the plug reaches the surface and oxidizes, turning dark.
A specific type of bacteria that naturally lives on skin also plays a role. It thrives in the oxygen-poor, oil-rich environment of a clogged pore, contributing to the buildup and setting the stage for inflammation if the plug ruptures deeper into the skin.
Why They Develop
Hormones
Hormones called androgens are the primary driver. Androgens stimulate the oil glands to produce more sebum, and they also influence the part of the follicle where plugging begins. Testosterone gets converted into a more potent form called dihydrotestosterone, which is about five times stronger in its effect on oil glands. This is why closed comedones often first appear during puberty, before menstrual periods, or during other hormonal shifts. Some people have oil glands that are simply more sensitive to normal hormone levels, which explains why you can develop comedonal acne even with perfectly normal bloodwork.
Skincare and Makeup Products
Certain ingredients in skincare, makeup, and even hair products can clog pores on their own. Ingredients like acetylated lanolin alcohol, some forms of seaweed extract, and various waxes are known to be comedogenic. Labels claiming “non-comedogenic” are largely unregulated, so a product marketed for clear skin can still contain pore-clogging ingredients. The only reliable way to check is to look at the actual ingredient list.
Skin Cell Turnover
Your epidermis completely replaces itself roughly every 40 to 56 days. When this turnover slows down or becomes irregular, dead cells accumulate inside pores faster than they can be shed. This is one reason closed comedones tend to be persistent: even after the initial clog is addressed, the underlying turnover problem keeps creating new ones.
How They Differ From Other Breakouts
Closed comedones are considered non-inflammatory acne. They don’t hurt, they’re not red, and they don’t contain pus. An open comedone (blackhead) has the same basic structure but with an exposed surface, which is why it darkens. A papule or pustule is what happens when a comedone becomes inflamed, either from bacterial activity or from the follicle wall rupturing under pressure. If you’ve been squeezing closed comedones and they turn into angry red bumps, that’s exactly this progression.
Topical Treatments That Work
Retinoids
Retinoids are the gold standard for closed comedones. The American Academy of Dermatology calls them the core of topical acne therapy because they directly target the mechanism behind comedone formation. They work by normalizing how skin cells shed inside the pore, reducing the buildup that creates plugs in the first place. They also have anti-inflammatory effects, blocking pathways that lead to redness and swelling.
Expect irritation during the first one to two weeks, including dryness, peeling, and possibly a temporary worsening of breakouts. This initial phase is normal and tends to subside. Significant improvement in clinical trials typically appeared after 12 to 15 weeks of consistent use. Tretinoin and adapalene (available over the counter in lower strengths) are the most widely used options.
Salicylic Acid
Salicylic acid is oil-soluble, which means it can penetrate into the pore itself rather than just working on the skin’s surface. It exfoliates the dead skin cells lining the follicle and reduces sebum production, making it particularly well-suited for closed comedones. Most over-the-counter products contain 0.5% to 2% concentrations. It’s gentler than retinoids for many people and can be used as a daily cleanser or leave-on treatment.
Glycolic Acid
Glycolic acid works differently. As a water-soluble molecule, it exfoliates the outer surface of the skin rather than penetrating into pores. It sloughs off dead cells from the top layer while helping retain moisture. It won’t reduce oil production the way salicylic acid does, but it can help prevent the surface-level buildup that traps clogs underneath. Some people use both, applying glycolic acid to the broader skin surface and salicylic acid directly on problem areas.
Benzoyl Peroxide
Benzoyl peroxide kills the bacteria involved in comedone formation and is often combined with retinoids or other treatments for a multi-pronged approach. It’s particularly useful when closed comedones have started progressing into inflamed breakouts.
Setting Realistic Expectations
Because the skin’s full renewal cycle takes 40 to 56 days, no topical treatment will clear closed comedones in a week or two. Most people need at least two to three full skin cycles, roughly 8 to 12 weeks, before seeing meaningful improvement. Starting a new treatment and quitting after three weeks because “it’s not working” is one of the most common mistakes. Consistency matters more than intensity.
It also helps to use treatments that combine multiple mechanisms. A retinoid to normalize cell turnover plus benzoyl peroxide to address bacteria, for example, will outperform either one alone. The AAD specifically recommends this combined approach for comedonal acne.
Why You Shouldn’t Extract Them Yourself
The temptation to squeeze closed comedones is real, but the follicle is sealed. Without a way for the contents to exit, squeezing just forces the plug deeper into the skin or ruptures the follicle wall, triggering inflammation and potentially leaving a scar. Dermatologists who perform extractions first make a tiny incision with a sterile needle to create an opening, then use a specialized tool to express the contents with controlled pressure. Even in professional settings, incomplete extraction and recurrence are recognized risks. At home, without sterile instruments or proper technique, you’re far more likely to make the problem worse.
Common Patterns Worth Knowing
If your closed comedones are concentrated along your hairline or temples, hair products are a likely culprit. If they cluster along your jawline and chin, hormonal fluctuations are more probable. A sudden crop of comedones across your cheeks or forehead after starting a new moisturizer or sunscreen points to a comedogenic ingredient. Tracking when and where they appear often reveals the trigger faster than any product can treat it.