Milia are small, white bumps that form when keratin gets trapped beneath the skin’s surface, and preventing them comes down to keeping your skin’s natural turnover process working efficiently. These tiny cysts, usually 1 to 2 millimeters across, aren’t dangerous, but they’re stubborn once they form and won’t respond to squeezing or popping like a regular pimple. The good news is that a few targeted skincare habits can significantly reduce how often they appear.
What Actually Causes Milia
Understanding what’s happening under the skin helps explain why certain prevention strategies work. Milia form around the tiny hair follicles and sweat glands in your skin. They contain layers of compacted keratin, the same protein that makes up your hair and the outer layer of your skin. When dead skin cells don’t shed properly, that keratin material accumulates into a small, hard cyst just below the surface.
There are two types. Primary milia arise from the hair follicles on their own, often without a clear trigger. These are the kind that appear on newborns (about 40 to 50 percent of babies get them) and typically resolve without any treatment within a few weeks. Secondary milia develop after something damages the skin: sunburns, blistering rashes, injuries, or even certain cosmetic procedures. The damaged skin creates new pathways where keratin can become trapped during the healing process.
This distinction matters for prevention. If you’re an adult dealing with recurring milia, especially around the eyes, cheeks, or forehead, you’re likely dealing with a combination of sluggish skin turnover and products or habits that are contributing to the problem.
Keep Skin Exfoliated Consistently
The single most effective prevention strategy is regular chemical exfoliation. Because milia form when dead skin cells and keratin don’t shed on their own, using ingredients that speed up that turnover process keeps the tiny openings around hair follicles and sweat glands clear.
Two types of chemical exfoliants work well here. Glycolic acid, an alpha hydroxy acid (AHA), dissolves the bonds between dead skin cells on the surface, making it easier for them to slough off. It’s water-soluble, so it works primarily on the outer layer of skin. Salicylic acid, a beta hydroxy acid (BHA), is oil-soluble, which means it can penetrate into pores and follicles to clear buildup from the inside. For milia prevention specifically, a product containing either ingredient used two to three times per week is a reasonable starting point. Many people find a leave-on serum or toner with glycolic acid in the 5 to 10 percent range works well without excessive irritation.
Physical scrubs can help mildly, but they can’t reach the deeper follicular level where milia originate. Chemical exfoliants are more effective because they work at a cellular level to normalize the shedding process.
Use a Retinoid Product
Retinoids are one of the most reliable tools for preventing milia because they directly address the root cause. They work by reducing excessive keratin cell production and promoting normal shedding of dead skin cells. This keeps the follicles and ducts clear of the keratin buildup that forms milia.
Over-the-counter adapalene (sold as Differin) is the strongest retinoid available without a prescription and is commonly recommended for milia-prone skin. Retinol serums at lower concentrations are another option, particularly for the delicate skin around the eyes where milia frequently appear. If you’re new to retinoids, apply every other day for the first two to four weeks, since that’s the window when irritation peaks. After your skin adjusts, you can move to nightly use.
Retinoids also thin the outermost layer of dead skin slightly over time, which makes it harder for keratin to become trapped in the first place. This is why dermatologists often suggest retinoids as a long-term maintenance step for people who get milia repeatedly.
Avoid Heavy, Pore-Clogging Products
What you put on your skin plays a major role in milia formation, especially around the eyes and cheeks. Thick, occlusive ingredients can seal over the tiny openings where hair follicles and sweat ducts reach the surface, trapping keratin underneath.
The most common culprits include:
- Mineral oil derivatives: Check ingredient labels for liquid paraffin, liquid petroleum, paraffinum liquidum, or petrolatum liquid. These are all forms of mineral oil that sit heavily on the skin’s surface.
- Lanolin: An oil derived from sheep’s wool, commonly used as an emollient in rich moisturizers and eye creams. Its thick, greasy texture is known to contribute to clogged pores and milia in people who are prone to them.
- Heavy waxes and thick balms: Undereye balms and overnight sleeping masks that create a strong occlusive barrier can be problematic, particularly if you’re already noticing milia in those areas.
This doesn’t mean you need to avoid moisturizer entirely. Look for lightweight, oil-free formulas labeled non-comedogenic. Gel-based moisturizers and those containing hyaluronic acid provide hydration without sealing over the skin’s surface. Pay special attention to your eye cream, since the skin around the eyes is thinner and more susceptible to milia. If you’ve been using a rich eye cream and noticing small white bumps appearing in that area, switching to a lighter formula is often all it takes.
Protect Your Skin From Sun Damage
Chronic sun exposure is a well-documented trigger for secondary milia. UV damage thickens the outer layer of skin over time, a process called photoaging, which makes it harder for dead cells to shed normally. This creates the conditions for keratin to become trapped. Milia that appear on sun-exposed areas like the cheeks, nose, and forehead in middle-aged and older adults are frequently linked to years of cumulative sun damage.
Daily sunscreen use helps on two fronts: it prevents the skin thickening that leads to milia, and it protects against the kind of sunburn-related skin damage that can trigger secondary milia directly. Choose a lightweight, non-comedogenic sunscreen to avoid the product-clogging issue described above. Mineral sunscreens containing zinc oxide tend to sit on top of the skin rather than absorbing into pores, which some people with milia-prone skin prefer. If you find that a particular sunscreen seems to cause bumps, the formula may be too heavy for your skin type.
Be Cautious With Certain Procedures
Ironically, some skin treatments intended to improve your complexion can trigger milia. Medium and deep chemical peels cause milia in up to 20 percent of patients, typically appearing two to four months after the procedure. Laser resurfacing and dermabrasion carry similar risks. The healing process after these treatments involves rapid new skin growth, and keratin can become trapped during that regeneration.
If you’re considering a professional resurfacing treatment and you’re already prone to milia, mention this to your provider beforehand. Using a retinoid product during the healing period (once your provider clears you to do so) can help keep skin turnover normal and reduce the chance of post-procedure milia forming. Superficial peels and gentle microdermabrasion carry a much lower risk and can actually help prevent milia by promoting regular exfoliation.
A Simple Prevention Routine
You don’t need a complicated regimen. For most milia-prone adults, prevention comes down to three habits working together: regular chemical exfoliation two to three times a week, a retinoid product used most evenings, and switching away from heavy occlusive moisturizers and eye creams. Add daily sunscreen and you’ve addressed the major triggers.
If milia keep forming despite these steps, the bumps you’re seeing may need professional extraction. A dermatologist can use a sterile needle or small blade to release the trapped keratin, something you should not attempt at home since the cysts sit deeper than they appear. But for most people, consistent prevention makes extraction an occasional fix rather than a recurring frustration.