Last updated: June 2, 2026
Quick Answer: Milia in adults are tiny, hard, white or yellowish cysts that form when keratin becomes trapped beneath the skin's surface. Unlike acne, they have no pore opening and cannot be squeezed out safely. Most cases resolve with professional extraction, topical retinoids, or gentle exfoliation, and they can largely be prevented by choosing lightweight, non-comedogenic skincare products and protecting skin from sun damage.
Milia are small, dome-shaped cysts filled with keratin, the same protein that makes up hair and nails. They sit just beneath the skin's surface and typically measure 1 to 2 millimetres in diameter. Unlike a pimple, a milium (the singular form) has no opening to the skin's surface, which is why it cannot be expressed by squeezing. [1]
Milia in adults form when dead skin cells fail to shed normally and instead become trapped in a small pocket beneath the outer layer of skin. The body encases this trapped keratin in a thin wall of skin cells, creating the characteristic firm, pearly white bump. [2]
Where do they appear?
Milia are often confused with other small skin lesions. For a broader look at how dermatologists classify and identify different bumps and growths, the complete guide to 25+ types of skin lesions is a useful reference.
Milia in adults have different triggers than the neonatal milia seen in newborns. In newborns, milia appear because sweat glands are not yet fully developed. In adults, the causes are almost always acquired, meaning they result from external factors or changes in skin biology over time. [2]
The main causes of milia in adults include:
1. Sun damage
Chronic sun exposure thickens the outer layer of skin (the stratum corneum) and slows the natural cell-shedding process. This makes it harder for trapped keratin to escape, and milia form as a result. [2] This is one reason milia are more common in people over 40 who have had significant lifetime sun exposure.
2. Heavy or occlusive skincare products
Thick, oil-based moisturizers, lanolin-heavy creams, and certain ointments can coat the skin and interfere with normal exfoliation. When dead skin cells cannot shed, they accumulate beneath the surface. [2]
3. Aging
As skin ages, cell turnover slows naturally. The skin becomes less efficient at shedding dead cells, which increases the chance of keratin becoming trapped. [2]
4. Skin trauma or injury
Burns, blistering rashes, dermabrasion, laser resurfacing, and even aggressive chemical peels can disrupt the skin's normal healing architecture. Milia that develop after injury or a procedure are called secondary (or traumatic) milia. [3]
5. Topical steroid use
Long-term application of potent topical corticosteroids can thin the skin and alter the hair follicle structure, creating conditions where milia can develop.
6. Certain medical conditions
Autoimmune blistering diseases such as bullous pemphigoid, and metabolic conditions such as porphyria cutanea tarda, are associated with milia formation as a secondary effect of skin damage.
"Milia in adults are almost always acquired rather than inherited, which means the right lifestyle and skincare adjustments can meaningfully reduce how often they appear."
Milia are not acne. This distinction matters because treating milia like acne (squeezing, applying benzoyl peroxide, or using harsh drying agents) is ineffective and can damage the skin.
FeatureMiliaWhiteheads (Acne)ContentsKeratin (protein)Sebum, bacteria, dead cellsPore openingNoneYes (blocked pore)TextureHard, firmSoft, compressibleInflammationNoneOften presentCan be squeezed?No (safely)Yes, though not recommendedResponds to benzoyl peroxide?NoYesLocationAny area, often under eyesOily zones: forehead, nose, chin
Whiteheads form inside a hair follicle that has a blocked opening. Milia form independently of hair follicles and sit in a closed sac with no exit route. [1] This is why squeezing a milium produces no result and can leave a scar.
For adults dealing with persistent breakouts that may include both milia and acne-type lesions, the cystic acne treatment guide covers the acne side of the picture in more detail.
Yes. Specific product ingredients and formulations are strongly associated with milia development in adults. Heavy, occlusive products are the most common culprits, but the issue is more specific than just "avoid thick creams." [2]
Product types most likely to contribute to milia:
Ingredients less likely to cause milia:
Practical rule: If a product feels like it sits on top of the skin rather than absorbing into it, it carries a higher milia risk for people who are already prone to them. Look for the label "non-comedogenic," though this term is not regulated and should be treated as a guide rather than a guarantee.
Both can contribute, though the risk depends on the specific formulation rather than the product category itself. [5]
Sunscreens: Physical (mineral) sunscreens containing zinc oxide or titanium dioxide in thick, cream-based formulas are more likely to contribute to milia than lightweight fluid or gel-based options. Chemical sunscreens in gel or water-gel formulations are generally less occlusive. Daily sunscreen use is still strongly recommended for milia prevention overall, because sun damage is a primary cause. The key is choosing the right formula.
Makeup: Full-coverage foundations, heavy concealers, and cream-based products applied daily without thorough removal can contribute to milia over time. Makeup that is not fully removed at night is a particular concern because it can mix with sebum and dead skin cells, slowing normal exfoliation.
Prevention tips for makeup and sunscreen users:
Milia are not primarily a skin-type condition, but dry skin carries a modestly higher risk. People with dry skin often compensate by using heavier, more occlusive moisturizers, which can contribute to milia. Dry skin also tends to have slower cell turnover, which is a contributing factor. [3]
People with oily skin are more prone to acne and blackheads but are not necessarily more prone to milia. The confusion arises because both conditions produce small bumps on the face.
Who is at higher risk regardless of skin type:
Yes. When milia appear in large numbers, spread to unusual locations, or keep returning despite good skincare habits, an underlying medical cause should be considered. [4]
Conditions associated with secondary milia:
Medications: Long-term use of topical corticosteroids, particularly on the face, is a well-recognized trigger. Some systemic medications have also been associated with milia as a side effect.
If milia appear suddenly in large numbers, are accompanied by blistering, or are located in unusual areas (such as the trunk or limbs), a dermatologist should evaluate them. For context on how skin lesions are categorized and assessed, the types of cysts guide offers a useful overview of benign skin growths.
Home removal of milia carries a real risk of scarring and infection and is generally not recommended. That said, some non-invasive home strategies can help milia resolve on their own over time, particularly for primary milia that are not deep-seated.
What can be done at home:
What should not be done at home:
When to go to a dermatologist or clinician:
For a detailed walkthrough of the clinical removal process, the complete guide to milia removal covers professional techniques in depth.
Professional milia removal in Canada typically costs between $100 and $300 per session, with the final price depending on the number of milia being treated, the clinic's location, and the technique used. This is a cosmetic procedure and is not covered by provincial health insurance in most cases.
Typical cost breakdown by method:
ProcedureEstimated Cost (Canada, 2026)NotesManual extraction (lancing)$100 to $200 per sessionMost common; treats multiple milia per visitCryotherapy$150 to $250 per sessionFreezing with liquid nitrogenLaser ablation$200 to $400 per sessionBest for resistant or deep miliaChemical peel$150 to $300 per sessionOften used alongside extraction
These figures are estimates based on typical clinic pricing in Ontario. Costs vary by city and provider. For current pricing at a dedicated minor surgery clinic, the Minor Surgery Center treatment pricing page provides specific fee information.
Most adults need only one or two sessions to clear existing milia, though ongoing prevention is needed to stop new ones from forming.
Chemical peels can be effective for milia, particularly superficial peels using glycolic acid or trichloroacetic acid (TCA), which accelerate the shedding of the outer skin layer and can help release trapped keratin. [4] They work best as part of a broader treatment plan rather than as a standalone solution.
Microdermabrasion has a more limited role. It removes the very outermost layer of dead skin cells through mechanical abrasion, which can improve skin texture and mildly support cell turnover. For superficial milia, it may help over multiple sessions. However, microdermabrasion alone is unlikely to resolve deeper milia and should not be used as the primary treatment.
What the evidence supports:
Important caveat: Aggressive procedures (deep chemical peels, ablative laser resurfacing) can themselves trigger secondary milia during the healing process. This is a known complication and underscores the importance of choosing an experienced clinician.
Prevention after removal is straightforward but requires consistency. The goal is to maintain normal skin cell turnover and avoid the product and environmental triggers that caused milia in the first place.
Core prevention routine:
Most treatment failures come down to a handful of predictable errors. Knowing them in advance saves time, money, and skin damage.
Mistake 1: Trying to squeeze or pop milia
This is the most common mistake. Milia have no pore opening, so squeezing achieves nothing except trauma to the surrounding skin, which can cause post-inflammatory hyperpigmentation or scarring. [3]
Mistake 2: Using acne treatments
Salicylic acid, benzoyl peroxide, and sulfur-based products target bacteria and excess sebum. Milia contain neither. These products will dry and irritate the skin without touching the keratin cyst. [1]
Mistake 3: Over-exfoliating
The logic of "if some exfoliation helps, more must help faster" is flawed here. Aggressive daily exfoliation damages the skin barrier, triggers inflammation, and can slow the very cell turnover process that helps milia resolve.
Mistake 4: Switching products too frequently
Topical retinoids and AHAs take 6 to 12 weeks to show meaningful results. Many people abandon them after 2 to 3 weeks and conclude they do not work.
Mistake 5: Ignoring the cause
Removing existing milia without changing the skincare products or habits that caused them means new milia will form. Treatment and prevention must happen together.
Mistake 6: Attempting home lancing near the eye area
The skin around the eyes is extremely thin and the eye itself is at risk from any sharp instrument. Milia on or near the eyelid should always be treated by a professional.
Milia are benign and not a health risk in the vast majority of cases. However, certain presentations warrant professional evaluation.
See a dermatologist or clinician if:
It is worth noting that while milia themselves are harmless, widespread or treatment-resistant milia can occasionally signal an underlying skin disease. A dermatologist can distinguish milia from other conditions that may require different management. For example, seborrheic keratosis and basal cell carcinoma can occasionally be confused with benign skin lesions on initial inspection.
Q: Are milia contagious?
No. Milia are not caused by a virus, bacteria, or fungus. They cannot be spread from person to person or from one area of the skin to another through contact.
Q: Will milia go away on their own without treatment?
Primary milia in adults can resolve on their own, but this often takes months to years. Secondary milia (caused by skin trauma or a medical condition) are less likely to resolve without intervention. Using a topical retinoid or AHA exfoliant significantly speeds up resolution. [5]
Q: Can milia appear on the eyelids specifically?
Yes. The eyelid and periorbital area is the most common location for milia in adults. Eyelid milia should be removed by a professional because the skin is very thin and the proximity to the eye makes home treatment unsafe.
Q: Is there a link between milia and diet?
No strong clinical evidence links specific foods to milia formation. Unlike acne, milia are not driven by sebum production or hormonal fluctuations related to diet. General skin health, however, benefits from a balanced diet and adequate hydration.
Q: Can retinol really get rid of milia?
Retinol and prescription tretinoin accelerate skin cell turnover, which helps the trapped keratin work its way to the surface over time. They are more effective at preventing new milia than at rapidly clearing existing ones. For faster results, professional extraction combined with a retinoid maintenance routine is the most effective approach. [5]
Q: How long does it take for milia to clear after professional treatment?
After professional lancing and extraction, milia are cleared immediately. The treated area may be slightly red for 24 to 48 hours. New milia can form if the underlying cause is not addressed, which is why prevention strategies are essential after treatment.
Q: Can milia affect darker skin tones differently?
The formation of milia is the same regardless of skin tone. However, people with darker skin tones have a higher risk of post-inflammatory hyperpigmentation if milia are squeezed or treated aggressively. This makes professional removal particularly important for darker skin types to minimize the risk of discoloration.
Q: Are milia the same as syringomas?
No. Syringomas are benign tumors of the sweat ducts that often appear in clusters around the lower eyelids. They are flesh-colored to yellowish, slightly larger than milia, and have a different texture. A dermatologist can distinguish between the two on clinical examination.
Q: Do milia come back after laser treatment?
Laser ablation is effective for resistant milia, but new milia can form if the triggering factors (heavy products, sun damage, slow cell turnover) are not addressed. Maintenance with topical retinoids and appropriate skincare significantly reduces recurrence.
Q: Is it safe to use an at-home extraction tool for milia?
Comedone extractors and lancets sold for home use are designed for acne. Using them on milia without proper training risks incomplete removal, infection, and scarring. Professional extraction by a trained clinician is the safe and effective standard.
Milia in adults are common, benign, and manageable. They form when keratin becomes trapped beneath the skin due to sun damage, heavy skincare products, aging, skin trauma, or underlying medical conditions. They are not acne and should not be treated as such.
Actionable next steps:
Milia rarely signal anything serious, but they respond best to a consistent, evidence-based approach rather than improvised home remedies. With the right products and professional support when needed, most adults can keep milia well under control.
[1] Picture Of White Bumps Milia - https://www.webmd.com/skin-problems-and-treatments/picture-of-white-bumps-milia?utm_source=openai
[2] Milia - https://www.medicoverhospitals.in/diseases/milia/?utm_source=openai
[3] Milia (Medical News Today) - https://www.medicalnewstoday.com/articles/320953?utm_source=openai
[4] Milia (Healthline) - https://www.healthline.com/health/milia?utm_source=openai
[5] How To Get Rid Of Milia - https://www.healthline.com/health/skin-disorders/how-to-get-rid-of-milia?utm_source=openai
[6] How To Treat Milia - https://www.nbcnews.com/select/shopping/how-to-treat-milia-rcna192211?utm_source=openai
