Salicylic and glycolic acid for milia

"Gentle exfoliator for milia" is one of the most searched milia phrases, along with salicylic acid and glycolic acid for milia. The idea makes sense at first: milia are made of trapped dead skin protein, and exfoliants remove dead skin. The medical sources contain no evidence for it. No study shows that an acid exfoliant clears milia, and strong clinic peels are on the list of things that can cause them. This guide sets out what the sources do say, how to exfoliate safely if you choose to, and what works better for milia. For what milia are, see the hub guide, what milia are.

Skinli gives general education and is not a doctor.

What exfoliation does

The American Academy of Dermatology (AAD) says "Exfoliation is the process of removing dead skin cells from the outer layer of your skin." It describes two kinds. "Mechanical exfoliation uses a tool, such as a brush, pad, or sponge, or a scrub to physically remove dead skin cells. Chemical exfoliation uses chemicals, such as alpha and beta hydroxy acids, to dissolve dead skin cells."

The U.S. Food and Drug Administration (FDA) says alpha hydroxy acids (AHAs), such as glycolic acid and lactic acid, "cause exfoliation, or shedding of the surface skin," and that how much depends on "the type and concentration of the AHA, its pH, and other ingredients." It calls salicylic acid "the BHA most commonly used in cosmetics," BHA meaning beta hydroxy acid.

Why an acid may not reach a milium

StatPearls, a medical reference hosted by the U.S. National Library of Medicine, describes milia as "subepidermal keratin cysts." Subepidermal means below the epidermis, the top layer of skin. Each cyst has "walls of several layers" of skin cells around a core of keratin.

So the two things sit at different depths. The FDA describes acid exfoliants as shedding the surface skin, and a milium is a walled cyst under that surface. No study has tested whether an exfoliating acid can open or shrink one. That is the plain state of the evidence: untested, with no sign so far that it works.

What the evidence shows

• StatPearls treatment list. It names "simple surgical interventions such as evacuation with a tiny incision," and for multiple milia, "topical retinoids and electrodesiccation or electrocautery." Exfoliating acids are absent from the list.
• Children with milia en plaque. A 2026 overview in Dermatology Practical & Conceptual reports six children with this rare type, a patch of milia on a red base. "In two salicylic acid was applied." The paper does not report whether it helped.
• Milia en plaque in adults. A 2014 review lists "electrodessication, dermabrasion, cryotherapy, simple excision, surgical opening of the cysts, topical retinoids, oral minocycline, photodynamic therapy and CO 2 laser." Acid exfoliants are absent from this list too.

Strong peels and resurfacing can cause milia

Several sources name skin treatments that damage the surface as causes of milia.

• A 2005 review in the Journal of Cosmetic Dermatology says medium-depth peels are done with trichloroacetic acid (TCA) at 35 to 50 percent alone, or at 35 percent combined with another agent such as Jessner's solution, "70% glycolic acid," or solid CO2. It says that sometimes complications occur, including dark or light patches, redness, raised scars and infections, "and milia."
• A 1997 paper in Plastic and Reconstructive Surgery on CO2 laser resurfacing lists "acne, milia, dermatitis, and infection" among common problems after the procedure.
• StatPearls says secondary milia "may arise after trauma, such as dermabrasion or radiotherapy."

These are clinic procedures. The 70 percent glycolic acid in that peel is seven times the 10 percent limit that the FDA page reports for glycolic acid in consumer products. No source reports milia from the glycolic or salicylic acid in everyday cleansers and toners. The guide chemical peels for acne scars describes peel strengths.

Salicylic acid or glycolic acid?

Neither has been tested for milia. What the FDA and the AAD say about each:

	Glycolic acid (AHA)	Salicylic acid (BHA)
What it does	Sheds surface skin (FDA)	Exfoliates (FDA); an acne ingredient (AAD)
Sun	Raises sun sensitivity; FDA "Sunburn Alert"	Can raise sun sensitivity; FDA advises sun protection
Strength limit cited by FDA	Safety panel: 10 percent or less, pH 3.5 or higher	No limit given on the FDA page
Children	No child rule on the FDA page	FDA: "Avoid using BHA-containing products on infants and children"

The FDA reports its own studies: after four weeks of an AHA cream, volunteers' "sensitivity to skin reddening produced by UV increased by 18 percent." It suggests AHA labels carry this advice: "Use a sunscreen, wear protective clothing, and limit sun exposure while using this product and for a week afterwards." For salicylic acid, the FDA advises: "Test any product that contains a BHA on a small area of skin before applying it to a large area."

The guide salicylic acid vs glycolic acid compares them for acne, where both have a real role.

Scrubs and brushes

"Scrub for milia" is a common search. The AAD says people with "dry, sensitive or acne-prone skin may prefer just a washcloth and a mild chemical exfoliator, as mechanical exfoliation may be too irritating for this skin type." It says to "avoid strong chemical or mechanical exfoliation if you have a darker skin tone," because more aggressive exfoliation can lead to increased pigmentation, meaning dark spots. And it says: "Never exfoliate if you have open cuts or wounds or if your skin is sunburned."

If you choose to exfoliate

Exfoliation can still be part of a skin routine for other reasons. The AAD's tips, in short:

1. Consider what else you use. Exfoliating on top of "prescription retinoid creams or products containing retinol or benzoyl peroxide" may "worsen dry skin or even cause acne breakouts."
2. Pick a method that suits your skin type.
3. Be gentle: apply the product "using small, circular motions," then rinse with lukewarm water.
4. Moisturize right after.
5. "Be careful not to over-exfoliate, as this could lead to skin that is red and irritated."

The guide how often to exfoliate your face covers schedules by skin type.

Keep acids away from the eyes and off babies

Most adult milia sit around the eyes. The StatPearls chapter on eyelid bumps, discussing molluscum contagiosum near the eye, says "Home treatments such as salicylic acid or benzoyl peroxide are not recommended to be used close to the eye." The guide milia under the eyes covers what a doctor can do there instead.

For babies, the FDA says to avoid BHA products on infants and children, and the AAD's baby acne page says to "Never put acne medicine or acne wash on your baby's skin, unless your child's dermatologist or pediatrician recommends it." Newborn milia clear without treatment, as the guide milia in babies explains.

How to spot an acid on a label

Many products sold for "texture" or "glow" contain the same acids, so it helps to read the ingredient list.

• AHAs. The FDA says "The most common AHAs in cosmetic products are glycolic acid and lactic acid." It lists citric acid, hydroxycaprylic acid and hydroxycapric acid among the others.
• BHAs. The FDA says BHA ingredients may be listed as "salicylic acid (or related substances, such as salicylate, sodium salicylate, and willow extract)."
• Ingredient lists. The FDA requires an ingredient declaration on cosmetics sold in stores. It says this rule does not cover products used only by professionals, such as in salons, so ask what a salon peel contains.

If you already use a retinoid, an acid cleanser and an acid toner, you are using three products that can each make skin dry or peel. The AAD says retinoids and retinol can make skin "more sensitive or peel," and that exfoliating on top of them "may worsen dry skin."

Questions to ask a dermatologist

• Are these bumps milia, or something an acid could help, such as whiteheads?
• Is an exfoliant worth trying for my milia, or should I go straight to removal?
• Can I keep using my acid cleanser while using a retinoid?
• Which products are safe near my eyes?

What to do instead

For a few milia that bother you, removal by a clinician is the method the sources describe, set out in milia removal. For many milia, StatPearls lists topical retinoids, covered in retinoids for milia.

When to see a doctor

See a dermatologist for milia that bother you, for many milia that appear at once, or for milia on the eyelids. Stop any exfoliant that causes burning, blisters or lasting redness, and see a doctor if the skin does not settle.