Milia: what causes them, and what actually helps.

Milia are small, white, dome-shaped cysts that typically appear around the eyes, nose, and cheeks. They are often mistaken for whiteheads, and the instinct to squeeze them is common. Both the diagnosis and the instinct are usually wrong.

What milia actually are

A milium (singular) is a keratin-filled cyst that forms just beneath the surface of the skin. Unlike a comedone, there is no opening — no pore through which the contents can be expressed. The keratin is encased in a thin layer of skin, which is why squeezing achieves nothing useful and usually causes irritation or scarring.

Milia are not acne. They are not infected. They are not caused by bacteria or excess oil. They do not respond to acne treatments, and treating them as such is one of the most common mistakes made in managing them.

Two types with different causes

Primary milia form spontaneously, without an identifiable trigger. They are particularly common in newborns — where they resolve on their own within a few weeks — but they also occur in adults, most often around the eyes and on the cheeks. In adults, primary milia may persist for months before resolving.

Secondary milia develop in response to some form of skin disruption. Common causes include:

• Sun damage — chronic UV exposure causes structural changes in the skin that can trap keratin beneath the surface
• Physical trauma — burns, abrasions, rashes, or blistering conditions can disrupt normal skin shedding
• Heavy occlusive products — thick, film-forming ingredients applied around the eye area can interfere with the natural desquamation process, trapping dead cells
• Certain topical medications — prolonged use of potent topical steroids has been associated with secondary milia formation

What actually helps

Patience. Primary milia in adults often resolve on their own over weeks to months. Waiting is a legitimate strategy, particularly for small numbers of milia.

Retinoids. By accelerating cell turnover, retinoids support the normal desquamation process that allows trapped keratin to work its way to the surface. This is one of the few topical options with a plausible mechanism for milia. Results take time — expect weeks to months, not days.

Gentle exfoliation. Regular use of a mild exfoliating acid — glycolic or lactic at moderate concentrations — supports surface cell shedding and may prevent new milia from forming. This is supportive, not curative.

Professional extraction. A dermatologist or trained aesthetician can extract milia safely by making a very small incision with a sterile lancet and pressing out the contents. This is effective and leaves no scarring when done correctly. It is the fastest resolution for established milia that are not resolving on their own.

What does not help

Squeezing. Scrubbing. Acne spot treatments. Salicylic acid applied directly to closed milia — salicylic acid is oil-soluble and designed to penetrate open follicles; milia have no follicular opening. These approaches do not address the mechanism and can irritate the surrounding skin.

Prevention

The most useful preventive measures are structural rather than product-specific.

Keep the eye area lighter. Heavy eye creams applied in excess can contribute to secondary milia in the periorbital area. A lighter formulation applied in small amounts is usually sufficient.

Exfoliate consistently. A regular, mild exfoliation routine supports the skin's natural shedding cycle and makes milia formation less likely over time.

Wear SPF daily. UV exposure is one of the primary causes of secondary milia in adults. Daily broad-spectrum sunscreen reduces cumulative solar damage.

Milia are benign, but persistent ones benefit from professional extraction rather than improvised home treatment. For skin that forms them repeatedly, a consistent retinoid and exfoliation routine is more useful than any targeted milia-specific product.