Milia
Milia — tiny, firm white or yellowish bumps that form when keratin becomes trapped just beneath the surface of the skin. They are harmless, painless, and most often appear around the eyes, cheeks, and nose in both infants and adults.
Key points
- They are small keratin-filled cysts, not clogged pores or acne, so they do not have an opening to the surface.
- In adults they can follow skin injury, sun damage, or the use of heavy occlusive products.
- Unlike whiteheads, milia cannot simply be squeezed out and usually need professional extraction if removal is desired.
- Gentle exfoliation with ingredients like retinoids or mild acids may help reduce their appearance over time.
What milia are often mistaken for
| Often confused with | How to tell them apart |
|---|---|
| Whiteheads (pustules) | Soft, inflamed, filled with pus and gone within days. A milium is firm, uninflamed and unchanged for months. |
| Closed comedones | Skin-coloured, compressible, sitting over a visible follicular opening, and they respond to retinoids. Milia are chalk-white, hard and have no opening. |
| Syringoma | Benign sweat-duct growths: yellowish, softer, usually symmetrical clusters on the lower eyelids, present for years. |
| Sebaceous hyperplasia | Yellowish and doughnut-shaped with a central dip, mostly on the forehead in older adults. Milia are smooth domes. |
| Xanthelasma | Soft yellow plaques rather than discrete bumps, on the inner eyelids; assessed by a clinician, as they can relate to blood lipids. |
| Molluscum contagiosum | Larger, flesh-coloured, with a dimpled centre; spreads across skin and between people, especially children. Milia do neither. |
| Epidermoid cyst | Much larger, softer and movable, usually with a visible central punctum. Milia are about 1–2 mm across. |
What is actually happening
A milium is a true cyst in miniature: a closed sac lined with epidermal cells and packed with compacted keratin, sitting just beneath the surface. The defining feature is what it lacks. A comedo is a plugged follicle whose opening still exists, so pressure can express it and ingredients can travel down the canal to reach it. A milium has no channel to the surface at all — which is why it feels hard, stays white rather than oxidising, and why squeezing achieves nothing but bruising and, at worst, a scar.
Primary milia arise on their own, thought to originate from vellus hair follicles or sweat ducts, and appear on the eyelids, cheeks and nose, including in a large proportion of newborns. Secondary milia appear where skin has already been injured and its small ducts disrupted: after burns, blistering conditions or trauma, after prolonged use of potent topical steroids, and after ablative laser or dermabrasion. They look identical; only the history differs.
What actually helps, and how long it takes
Because there is no opening, most of what works on comedones has little to reach. Retinoids and hydroxy acids help comedones by altering follicular keratinisation and loosening a plug in an open canal; a milium is a sealed sac under intact skin. They are commonly suggested and sometimes tried where the overlying skin is thickened, but the evidence that any topical clears an established milium is weak.
Time does more than products. Milia in newborns typically resolve without treatment over the first weeks of life. In adults many clear over weeks to months, though some persist for years. If removal is wanted it is mechanical rather than chemical: a clinician nicks the overlying skin with a sterile blade or needle and lifts the keratin core out, which takes seconds and gives an immediate result. That is not a home procedure, least of all near the eye.
When to see a clinician
Milia are harmless, so the reasons to seek an opinion are mostly about what else a small bump can be. Anything that grows, changes shape or colour, bleeds, crusts or fails to heal is not behaving like a milium and should be assessed promptly. So should a sudden crop of many lesions, milia appearing alongside fragile or blistering skin, or bumps that itch, spread or turn up in others in the household.
Bumps on a child's skin belong with a clinician rather than an at-home routine, including lesions persisting well beyond the newborn period. If you simply want them removed, a doctor or dermatologist can lance them under sterile conditions; the risk of marking is small in trained hands and considerably larger with a sewing needle. Mention any recent prescribed topical steroid or resurfacing, since both are relevant history.
Frequently asked
Should I try to pop milia at home?
No, milia lack an opening to the surface and attempting to squeeze them can cause scarring or infection, so professional removal is safer if they bother you.
Are milia the same as whiteheads?
No, whiteheads are clogged pores linked to oil and bacteria, while milia are keratin-filled cysts trapped under the skin's surface.
Will milia go away on their own?
Often, yes. In newborns they usually clear within the first weeks of life without treatment. In adults many resolve over weeks to months, but some sit unchanged for years.
Do milia in a newborn need treatment?
They are very common and generally resolve without intervention, so nothing needs to be applied. Any bump on a baby that is spreading, weeping, crusting or accompanied by a fever should be seen by a doctor.
Do rich eye creams cause milia?
This is widely repeated and not well established. Heavy occlusive products are often named as a contributing factor, but milia also appear on people who use nothing at all. Leaving a suspect product off for a couple of months is a reasonable test.
Can milia come back after they are removed?
The one that was removed does not return, but new ones can form nearby, particularly where skin has been injured or where they have appeared before. Removal treats the lesion rather than the tendency.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
