Milia are tiny cysts filled with keratin, a protein your skin naturally produces. They appear as small, dome-shaped bumps on the face, typically 1 to 2 millimeters in diameter, with a pearly white or yellowish color. Unlike pimples, milia have no opening at the surface, which is why they don’t respond to squeezing or popping.
How Milia Form
Each milium (the singular form) is essentially a miniature cyst that develops when keratin gets trapped beneath the skin’s surface. Most primary milia originate from the lower portion of a fine hair follicle, where dead skin cells become enclosed instead of shedding normally. The keratin hardens into a tiny ball just under the outermost layer of skin, creating that characteristic firm, white bump.
Secondary milia form through a different pathway. Instead of originating from hair follicles, they typically develop from sweat ducts or other skin structures after some kind of damage. Burns, blistering skin conditions, aggressive skin resurfacing procedures, or even prolonged sun damage can trigger them. While primary milia often clear up on their own, secondary milia tend to stick around longer.
Who Gets Them
Milia are remarkably common in newborns, appearing in 40% to 50% of babies, most often on the nose, scalp, and upper body. In infants, they resolve on their own within weeks to a few months without any treatment.
In adults, milia can develop at any age. They show up most frequently around the eyes, on the cheeks, and across the forehead. There’s no significant difference in rates between sexes or racial groups. Heavy moisturizers, thick sunscreens, or occlusive cosmetics that block pores can contribute to their formation, though many people develop milia without any obvious trigger.
Milia vs. Similar-Looking Bumps
Milia are easy to confuse with other small facial bumps, but a few details help distinguish them. Closed comedones (whiteheads) have a slightly different texture and sit within a pore, while milia feel harder and more defined, almost like a grain of sand under the skin. Syringomas, which are small growths from sweat glands, tend to be more yellow or skin-toned rather than pearly white. Sebaceous hyperplasia (enlarged oil glands) usually has a yellowish hue with a central indentation, something milia lack.
The key identifier for milia is their uniform appearance: firm, round, white-to-yellow, and very small. They don’t itch, hurt, or become inflamed unless you irritate them by picking.
Why You Shouldn’t Pick at Them
Because milia sit under a sealed layer of skin with no pore opening, they won’t drain the way a pimple does. Trying to squeeze, scratch, or pop them at home can lead to scarring, bruising, or infection. The area around the eyes is especially risky since the skin there is thinner and more prone to damage.
Professional Removal Options
A dermatologist can remove milia quickly through a procedure called de-roofing. Using a sterile needle or small blade, they create a tiny opening in the skin and extract the keratin plug. Results are immediate, and the procedure is straightforward for a trained professional.
For milia that are widespread or recurring, cryotherapy is another option. Liquid nitrogen is sprayed or swabbed onto each bump, freezing the tissue so it can be shed. This approach is commonly used for various skin growths and works well for milia that don’t respond to other methods. Milia near the eyelids should always be handled by a dermatologist or ophthalmologist rather than at home.
Topical Treatments That Help
While no cream will make a milium disappear overnight, certain ingredients can speed up skin cell turnover enough to help milia resolve over time and prevent new ones from forming.
- Retinoids and retinol: Vitamin A derivatives encourage faster shedding of dead skin cells, which helps trapped keratin work its way out. Use retinoid products once per day, ideally at night, since they increase sun sensitivity.
- Salicylic acid: This ingredient penetrates into pores and dissolves the bonds between dead skin cells. Look for it in cleansers or chemical peels.
- Glycolic acid: An exfoliating acid that works on the skin’s surface to thin the outer layer, making it easier for trapped keratin to escape. Available in cleansers, toners, and peels.
These ingredients work gradually, often over several weeks. They’re most effective as preventive measures or for very superficial milia rather than well-established, deep bumps.
Preventing New Milia
Skincare products play a bigger role in milia formation than most people realize. Heavy creams, thick balms, and oil-based products can create a seal over the skin that traps keratin underneath. Switching to lighter, non-comedogenic moisturizers and face-specific sunscreens reduces this risk. When choosing sunscreen for your face, look for formulas with SPF 30 or higher that are designed not to clog pores.
Regular gentle exfoliation helps keep the skin’s surface clear so dead cells shed normally instead of building up. Cleansers containing salicylic acid, glycolic acid, or citric acid offer mild daily exfoliation without being harsh. If you use retinol or retinoid products at night, pair them with sunscreen during the day, since these ingredients make your skin more vulnerable to UV damage that can itself trigger milia formation.