Milia — what they are, why they form, and how to treat them.

Milia are tiny white or yellow domed cysts, typically 1–2mm in diameter, that appear just beneath the surface of the skin. They are most common around the eyes, on the cheeks, nose, and forehead — areas with fine skin and minimal follicular activity.

They are frequently confused with whiteheads, but the two are structurally distinct. A whitehead (closed comedone) is a blocked follicle — open at the top, with a thin layer of skin over accumulated sebum and dead cells. A milium is a cyst entirely separated from the follicle, containing a ball of hardened keratin (dead skin protein) with no opening to the surface. This structural difference is why standard comedone extraction — applying pressure to the surrounding skin — does not work on milia and typically causes unnecessary trauma.

Why milia form

Milia develop when dead skin cells — keratinocytes — are not shed normally through the skin's surface and instead become trapped below the epidermis, forming a cyst as they accumulate and harden.

Several factors contribute:

Slowed surface cell turnover. When desquamation is slower than normal — due to age, sun damage, or products that inhibit natural shedding — keratin is more likely to accumulate and encyst. Sun-damaged skin frequently develops milia for this reason.

Heavy, occlusive topical products. Rich creams, petroleum-based products, and certain heavy oils used around the eyes or on fine-skinned areas can impede the normal shedding of keratinocytes and create conditions for milia formation. The under-eye area, with its thin skin and minimal follicular activity, is particularly susceptible.

Skin trauma. Secondary milia develop after skin trauma — burns, blistering conditions, dermabrasion, laser procedures. The skin's repair process can trap keratin within the healing epidermis. This type typically resolves on its own over weeks to months as the skin normalises.

Neonatal milia. Approximately half of all newborns develop milia on the face within the first weeks of life — a different mechanism, related to the immaturity of follicular development, and self-resolving within a few weeks without any treatment.

Treatment options

Retinoids. The most effective non-procedural treatment for milia. Retinoids accelerate keratinocyte turnover, promoting normal shedding and preventing the accumulation that produces cysts. Over time, existing milia reduce in size and new formation slows. Retinol can be started at low concentration and increased gradually; adapalene 0.1% is available over the counter and has a stronger evidence base for cellular turnover. Results take eight to twelve weeks and require consistent use.

AHA exfoliation. Regular chemical exfoliation with glycolic or lactic acid supports normal surface desquamation and can help prevent new milia from forming. Established cysts — already fully formed, without a surface opening — do not dissolve from topical acid use, but the surface environment that allows them to form is disrupted over time.

Professional extraction. A trained aesthetician or dermatologist can extract milia with a sterile lancet or comedone extractor, creating a small opening in the skin over the cyst and removing the keratin core with pressure. This is the most effective treatment for existing, established milia. Done correctly, it leaves no scar. Done without skill — or at home — it can cause trauma to the surrounding tissue.

Topical vitamin A (tretinoin). Prescription tretinoin at 0.025–0.05% is the most potent topical option for milia formation, particularly in sun-damaged skin with chronic milia production. It requires tolerance-building, is PM-only with mandatory SPF the following morning, but produces the most consistent results over time.

What does not work

Squeezing. Because milia have no follicular opening, pressing the skin around them produces no result except bruising, redness, and potential hyperpigmentation. The keratin ball has nowhere to go without a mechanical opening.

Salicylic acid. BHA exfoliation works by penetrating the pore lining. Milia are not in the follicle — they are encapsulated below the epidermis, outside the follicular structure. Salicylic acid does not reach them.

Pore strips. Designed for open comedone extraction from follicles; structurally irrelevant for cysts outside the follicular unit.

Prevention

For those prone to recurring milia:

Regular AHA exfoliation (1–2 times weekly) maintains the surface cell turnover rate that prevents accumulation. Avoiding heavy, occlusive products around the eye area and on fine-skinned zones reduces formation in susceptible areas. Daily SPF prevents the UV-induced skin damage that drives secondary milia formation in mature skin.

A retinoid used consistently is the most effective long-term prevention for people with ongoing milia formation — it addresses the root cause (slowed desquamation) rather than the symptom.

The Lux & Glo position

The cleansing oil's double-cleanse mechanism removes the product residue and surface debris that can impede normal shedding. The niacinamide serum supports the skin's general barrier function without the heavy, occlusive ingredients associated with milia formation around the eyes.

For established milia, the appropriate next step is professional extraction — not product-based intervention. For prevention and long-term management, introducing a retinoid into the evening routine and maintaining consistent AHA exfoliation addresses the cell-turnover mechanism directly.