Syringoma:
the under-eye bumps that are not milia

Syringoma is a benign growth of sweat-duct tissue in the dermis, seen as clusters of firm, skin-coloured to yellowish bumps on the lower eyelids. Unlike milia there is nothing to extract, and unlike xanthelasma it is not linked to cholesterol. Treatment is optional; ablative laser or fine-tip electrosurgery can flatten them, and recurrence is common.

What is a syringoma, and why does it cluster under the eyes?

A syringoma is a benign growth of sweat-duct tissue. It arises from the part of the eccrine sweat duct that runs through the skin, forming small nests of duct-like structures within the dermis. On the surface that looks like a firm bump of about 1 to 3 mm, skin-coloured to faintly yellow, flat-topped rather than domed. The medical word for it is a tumour, which sounds alarming, but here it simply means a growth: syringomas are not cancerous and are not known to become so.

They have a strong preference for the lower eyelids and upper cheeks, usually on both sides, often appearing as clusters that become more noticeable over the years. They are more common in women, typically appear from adolescence or early adulthood, are seen more often in people of Asian heritage, and can run in families. Less often they appear on the neck, chest, underarms or other sites, and an uncommon eruptive form produces many lesions across the body at once.

Most syringomas cause no symptoms. Their importance is cosmetic, and because they sit on the most looked-at skin of the face, they are a frequent reason for an under-eye consultation that turns out not to be about dark circles or eye bags at all. In most cases the diagnosis is made by examination under good light and magnification; a small biopsy is reserved for clusters that look unusual.

Syringoma, milia or xanthelasma: how are they different?

The three are often confused because all are small bumps around the eyes, but they are made of different things. A milium is a tiny sealed cyst of keratin: pearly white, firm and dome-shaped, cleared by opening its roof and expressing the pearl. A syringoma is solid sweat-duct tissue: skin-coloured, flatter and clustered, with nothing inside to express. Xanthelasma is a soft yellow plaque of lipid-laden cells, most often near the inner upper eyelid, and it raises a cholesterol question the other two do not.

The distinction changes what happens next. Milia respond to extraction, which is quick. Syringomas do not, and picking at them in the belief that they are milia only inflames the skin, which in Asian skin can leave a brown mark that outlasts the original bump. Xanthelasma prompts a fasting lipid check before any removal is planned. Getting the diagnosis right before treatment matters more on the eyelid than almost anywhere else, because the skin is thin and the margin for error is small.

Other lesions can mimic syringomas too. Sebaceous hyperplasia forms yellowish bumps with a small central dip, usually on the forehead and cheeks. Rarely, a skin cancer of sweat-duct origin can look similar when it forms a firm plaque. A cluster that is spreading, firm and plaque-like, or behaving differently from the classic pattern, is examined with that in mind, and sampled if there is doubt.

“A milium is a sealed pearl, not a blocked pore — there is no exit to squeeze it through, only skin to damage trying.”

Dr Sin YongOn why under-eye bumps should not be squeezed

Why do syringomas keep coming back?

Syringomas recur because of where they sit. The growth lies within the dermis and can extend deeper than it appears from the surface, so treatment that flattens the visible bump may leave duct tissue behind. That residual tissue can re-form a bump over time, which is why recurrence after treatment is described across the different methods.

Treating more deeply is not a simple answer. The lower eyelid has some of the thinnest skin on the body, and removing tissue to the full depth of a syringoma risks scarring, textural change or loss of pigment, trade-offs that can be more noticeable than the bump itself. Treatment of under-eye syringomas therefore aims for a balance: enough depth to flatten the lesion, conservative enough to protect the eyelid, accepting that some lesions may need attention again later.

New syringomas can also appear alongside treated ones, because the tendency to form them is constitutional. That is not a failure of treatment; it is the nature of the condition, and it is worth knowing before deciding whether, and how, to treat. Some people choose to leave syringomas alone once they understand this, which is a reasonable decision for a harmless lesion.

What treatment options exist for syringoma?

Treatment is optional, because syringomas are harmless. Where someone wants them flattened, the methods described in the medical literature include ablative laser, using carbon dioxide or erbium wavelengths; fine-tip electrosurgery or radiofrequency; and, for selected lesions, excision or chemical approaches. Topical retinoids are sometimes tried but are not reliable on their own for established lesions.

Ablative laser vaporises tissue in controlled layers, so each bump can be taken down while the skin between bumps is spared. Electrosurgery places a very fine energy tip into each lesion. Some clinicians use insulated radiofrequency needles, which deliver energy within the dermis while limiting heat at the surface; a published case in which two methods were compared side by side on the neck illustrates how much the method and settings shape healing. Which approach suits a given cluster depends on the number and depth of lesions, their site and your skin type, and it is discussed at assessment.

Cryotherapy is less suited to darker skin around the eyes, because freezing can leave pale patches, and the possibility of pigment loss is something to discuss before any method is chosen. This is one reason energy-based methods with careful depth control are commonly used in Asian skin.

On the day, the area is cleansed, the eyes are protected, and local or topical anaesthetic is applied before each lesion is treated. Small crusts then form over the treated bumps and separate as the skin heals. Eye make-up is kept off the sites until they have closed, rubbing is avoided, and daily sun protection helps limit darkening while the skin settles.

What can treatment realistically achieve, and what are its limits?

The realistic aim is a flatter, less noticeable cluster, not skin with no trace of syringomas. Treated lesions can recur and untreated ones can emerge. The healing eyelid can show redness and crusting for a while and, in Asian skin, a period of darkening that needs sun protection and patience. Occasionally a pale or slightly textured mark remains.

For that reason, conservative staging is common: a limited group of lesions, or a lighter pass, first, then review once the skin has healed, then a decision about whether to do more. Response varies between individuals, and the plan is adjusted to how your skin behaves rather than fixed in advance.

It also helps to separate syringomas from the rest of the under-eye picture. Hollowing, shadow, pigment and fine crepey lines are different problems with different treatments, and flattening bumps does not change them. Those distinctions are set out on the page on types of dark eye circles, and fine lines have their own assessment under under-eye lines.

What should you avoid, and when should you see a doctor?

Home extraction, needling and acid pens should be avoided. A syringoma is solid tissue, so there is nothing to release, and uncontrolled injury on the lower eyelid risks infection, scarring and pigment change close to the eye. Scrubs and over-the-counter bump-removal products do not reach the dermis where the growth sits, and they irritate the thin skin around it.

See a doctor if the bumps are new and spreading quickly, appear across the body, change in character or become a firm plaque, or if you are not sure whether they are syringomas, milia or xanthelasma. Syringomas are also more common in some conditions, including Down syndrome, and a rarer clear-cell type is associated with diabetes, so a doctor may ask about your general health.

Cost depends on the number and site of lesions treated, the method and how treatment is staged. This site does not publish fees; they are set out at consultation, after examination and before anything is agreed. Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh), MSc Aesthetic Medicine with Distinction (Queen Mary, London), MSc Practical Dermatology (Cardiff), examines eye-area lesions personally at Orchard Road. Where treatment is suitable, it is carried out at the clinic after that assessment.