Milia are tiny, hard bumps that form when keratin, a protein your skin naturally produces, gets trapped just beneath the surface. They look like small white or yellowish dots, usually less than 3 mm across, and they’re one of the most common skin concerns people mistake for whiteheads or acne. Unlike acne, though, milia aren’t caused by clogged pores and won’t respond to squeezing or typical acne treatments.
What Milia Look and Feel Like
Milia appear as smooth, dome-shaped bumps that are white to yellow on lighter skin tones. On darker skin, they often have a subtle blue tint. They’re firm to the touch, not soft or fluid-filled like a pimple, because the contents are solid keratin rather than oil or pus. Each bump sits under a thin layer of skin with no visible opening or pore at the surface.
They show up most often on the face, particularly around the nose, eyelids, cheeks, and forehead. They can also appear on the genitalia or anywhere the skin has been injured. Milia are painless and don’t itch or become inflamed on their own. Many people have just a few scattered bumps, while others develop clusters in one area.
Why Milia Form
Your skin constantly sheds dead cells and recycles keratin as part of its normal turnover cycle. Milia form when that process gets disrupted and keratin becomes trapped in a small pocket beneath the outer layer of skin, creating a tiny cyst. There’s no single cause, and some people are simply more prone to them than others.
Several external factors can trigger or encourage milia formation:
- Heavy skincare products: Thick creams, occlusive balms, and rich oils can trap dead skin and keratin, especially around the delicate eye area. Petroleum jelly, mineral oil, lanolin, beeswax, paraffin, cocoa butter, and shea butter are common culprits. Even dimethicone, a silicone found in many makeup products, can contribute when layered too heavily.
- Sun damage: Chronic UV exposure thickens the outer layer of skin over time, making it harder for keratin to shed normally.
- Skin injuries: Burns, blisters, rashes, or other trauma can disrupt skin’s structure and lead to milia forming during the healing process.
- Makeup buildup: Not fully removing makeup allows product residue to accumulate and block the skin’s natural shedding process.
Milia in Babies vs. Adults
Milia are extremely common in newborns, appearing as tiny white dots across the nose and cheeks within the first few weeks of life. In babies, they resolve on their own within a few weeks to months without any treatment. No creams, scrubs, or interventions are needed.
In adults, milia tend to be more stubborn. They can persist for months or longer because adult skin is thicker and turns over more slowly than infant skin. Adult milia often develop in response to specific triggers like the skincare and sun exposure factors described above, which means they’re more likely to recur unless those habits change.
How Milia Differ From Whiteheads and Other Bumps
The most common mix-up is between milia and whiteheads. Whiteheads (closed comedones) form inside a pore when oil and dead skin cells become trapped. They’re slightly softer, may have a visible pore opening, and respond to acne treatments like salicylic acid cleansers. Milia form under a thin layer of skin, completely separate from any pore, which is why they feel harder and don’t have an extractable opening.
Syringomas are another look-alike. These are small sweat gland growths that appear as yellowish or skin-toned bumps, often clustered around the eyes. They can look nearly identical to milia from the outside. The key difference is that syringomas are growths of gland tissue, not keratin cysts. A dermatologist can distinguish them through a skin biopsy, where syringomas have a distinctive tadpole or comma shape under the microscope.
Why You Shouldn’t Try to Pop Them
Because milia sit under the skin with no pore or opening at the surface, there’s nowhere for the contents to go when you squeeze. Attempting to pop milia at home won’t work and can cause infection, serious skin damage, and permanent scarring. The keratin plug is encased in a small sac that needs to be physically opened with a precise incision, which is not something fingernails or a sewing needle can safely replicate.
Professional Removal Options
If milia bother you cosmetically and don’t resolve on their own, a dermatologist can remove them in a quick office visit. The most common and effective method is manual extraction: a tiny incision is made over the bump with a needle or scalpel, and the keratin plug is gently pressed or lifted out with a small tool. The procedure takes seconds per bump and typically heals without scarring.
Cryotherapy is another option, where liquid nitrogen is applied to freeze and destroy each bump. Redness, swelling, and small blisters are normal afterward. Scabs form within about two weeks and fall off to reveal clear skin in four to six weeks. Laser ablation uses a focused beam to break down the cyst wall and vaporize the keratin inside, with a lower risk of scarring compared to other methods. Your dermatologist will recommend a method based on how many milia you have and where they’re located.
At-Home Management and Prevention
Gentle chemical exfoliation is the most effective at-home approach for both treating existing milia and preventing new ones. Look for cleansers or leave-on products containing glycolic acid, salicylic acid, or citric acid. Start with once a week and increase if your skin tolerates it. These ingredients help speed up skin cell turnover so keratin is less likely to become trapped.
Retinol products (the over-the-counter form of vitamin A) also promote faster cell turnover and reduce keratin buildup. Apply retinol once per day, ideally in the evening, and expect gradual improvement over several weeks rather than overnight results. Retinol can cause dryness and irritation when you first start, so introducing it slowly makes sense.
For prevention, the biggest changes are in product choices and sun protection. Switch to lightweight, non-comedogenic moisturizers and avoid heavy occlusives, particularly around the eyes. In hot, humid climates, occlusive products are especially likely to create conditions for milia. Remove makeup thoroughly every night. Daily SPF is important because chronic sun damage thickens the skin and contributes to milia formation in adults. You can’t guarantee milia will never return, but a consistent routine built around gentle exfoliation, lighter products, and sun protection significantly reduces the odds.