Milia are small, white bumps that form when keratin, a protein naturally found in skin, gets trapped just beneath the surface. They look like tiny white beads, usually 1 to 2 millimeters across, and feel firm to the touch. Unlike pimples, they don’t have an opening at the surface, which is why they can’t be squeezed out. They’re completely harmless, extremely common, and appear most often on the cheeks, nose, eyelids, and forehead.
How Milia Form
Your skin constantly sheds dead cells and replaces them with new ones. Normally, old keratin-rich cells flake away on their own. When that process gets disrupted, dead skin cells can become trapped in a tiny pocket near the surface, forming a small, hard cyst. These cysts sit just under the outermost layer of skin, which is why they appear white or yellowish and slightly raised.
Milia are technically tiny epidermoid cysts. Primary milia, the kind that show up without any obvious cause, are thought to originate from the lining of very fine hair follicles. Secondary milia develop after something damages the skin, such as a burn, a blistering rash, or even aggressive cosmetic procedures. The key difference: primary milia arise on their own, while secondary milia form at the site of an injury or skin condition.
Milia in Newborns vs. Adults
About 40% to 50% of newborns in the U.S. are born with milia, often called “milk spots.” In babies, they typically appear across the nose and cheeks and resolve on their own within a few weeks as the skin matures. No treatment is needed, and parents don’t need to do anything special.
In adults, the story is different. Milia can persist for months or even years if left alone. They tend to cluster around the eyes, on the cheeks, and along the forehead. Adults develop them for a variety of reasons: sun damage that thickens the skin over time, heavy moisturizers or sunscreens that block pores, or simply because their skin doesn’t shed dead cells as efficiently. Some medications, particularly certain steroid creams used long-term on the face, can also trigger them.
Milia vs. Whiteheads vs. Syringomas
Milia are often mistaken for whiteheads, but they’re structurally different. A whitehead is a clogged pore filled with oil and dead skin that sits inside an active hair follicle. It’s soft, and if you apply pressure, it may release its contents. A milium is a sealed cyst with no connection to a pore opening. It’s hard, dome-shaped, and won’t respond to squeezing. Acne products that work on whiteheads typically won’t clear milia that already exist.
Syringomas are another look-alike. These are benign growths of sweat gland tissue that appear as small, firm, yellowish or skin-colored bumps, often in clusters under the eyes. They’re similar in size to milia (1 to 3 millimeters) but tend to be slightly flatter and more uniform in color rather than distinctly white. Syringomas also don’t resolve on their own and require professional treatment if removal is desired.
What Causes Milia in Adults
Primary milia in adults often have no single identifiable cause. They simply appear, particularly in areas where the skin is thin, like around the eyes. But several factors make them more likely:
- Heavy skincare products. Rich creams, oil-based sunscreens, and thick foundations can trap dead skin cells beneath the surface.
- Sun damage. Years of UV exposure thickens the outer skin layer, making it harder for dead cells to shed normally.
- Skin injuries. Burns, rashes, dermabrasion, or laser resurfacing can all trigger secondary milia at the treatment site.
- Blistering conditions. Certain diseases that cause blisters beneath the skin’s surface are classic triggers for secondary milia.
Secondary milia can resolve on their own over time, but they tend to persist longer than the primary type.
Professional Removal Options
Because milia sit in sealed cysts with no pore opening, over-the-counter acne treatments won’t pop or drain them. A dermatologist can remove them quickly in the office using a few different approaches.
The most common method is manual extraction. The dermatologist cleans the area, makes a tiny nick in the skin surface with a fine blade or needle, then gently presses the cyst out. The whole process takes seconds per bump and leaves minimal marks. Some practitioners use fine-tipped forceps to grip the base of the bump and express the intact cyst through the opening. Healing is quick since the incision is so small.
For people with many milia or milia in delicate areas, other options include electrocautery (using a tiny electrical current to destroy the cyst), electrodesiccation, or laser therapy. These are typically reserved for more stubborn or widespread cases.
Attempting to extract milia at home with a needle or pin is risky. Without proper technique and a sterile environment, you can introduce infection, cause scarring, or damage the delicate skin around the eyes where milia often appear.
Skincare That Helps Prevent Milia
Since milia form when dead skin builds up and gets trapped, the most effective prevention strategy is keeping skin cell turnover healthy. Exfoliating cleansers containing salicylic acid, glycolic acid, or citric acid help dissolve the bonds between dead cells so they shed more easily instead of accumulating beneath the surface.
Retinol and prescription-strength retinoid creams are particularly effective. These vitamin A derivatives speed up cell turnover, which discourages the kind of keratin buildup that leads to milia. If you’re new to retinoids, start with a lower-strength retinol product used once per day to let your skin adjust.
Choosing the right moisturizer and sunscreen matters too. Look for products labeled non-comedogenic, and favor lighter, gel-based formulas over heavy creams, especially around the eye area. For sunscreen, mineral-based formulas tend to be less likely to clog the skin compared to some chemical sunscreen ingredients suspended in thick, oily bases. If you notice milia forming in the same area repeatedly, your skincare routine for that zone is worth re-evaluating.
What to Expect Over Time
Milia are not dangerous and don’t indicate any underlying health problem in most cases. In newborns, they clear within weeks without intervention. In adults, individual bumps can last months or longer, but they won’t grow, spread, or become cancerous. Many people develop a few milia at some point in their lives, particularly around the eyes as skin ages and cell turnover slows.
If you have a bump that’s growing, changing color, painful, or surrounded by redness, it’s likely not a milium. Those features suggest something else entirely, whether an inflamed cyst, an infection, or another type of skin growth that warrants a closer look from a dermatologist.