Are Montgomery Glands Normal? What They Are & When to Worry

Montgomery glands are a completely normal part of breast anatomy. Every person has them, regardless of sex or age. These small glands sit just beneath the surface of the areola and produce an oily secretion that lubricates and protects the nipple. The raised bumps they create on the areola’s surface, sometimes called Montgomery tubercles, are often most visible during pregnancy or breastfeeding, which is when many people first notice them and start wondering whether something is wrong. In almost every case, there is nothing to worry about.

What Montgomery Glands Actually Are

Montgomery glands are modified sebaceous (oil-producing) glands located in the areola, the pigmented skin surrounding the nipple. Most people have somewhere between four and 28 of them on each areola, though the number varies widely from person to person. They sit in small openings across the areola’s surface, and each one can produce a tiny amount of oily, slightly waxy secretion. When the glands are prominent enough to see or feel as small bumps, they are often referred to as Montgomery tubercles. The distinction between “gland” and “tubercle” is really just the difference between the structure itself and the visible bump it creates.

These glands share characteristics with both sebaceous glands found elsewhere on the body and the milk-producing tissue of the breast itself. Some Montgomery glands contain miniature milk-producing lobules alongside their oil-producing cells, which is why a small amount of milky fluid can occasionally emerge from them during late pregnancy or breastfeeding. This dual nature makes them unique among the body’s glands.

Why They Exist

The oily secretion from Montgomery glands serves a straightforward protective purpose. It keeps the areola and nipple skin moisturized and supple, which matters because the skin in that area is thinner and more delicate than most of the body’s surface. During breastfeeding, this natural lubrication helps prevent cracking and drying of the nipple from repeated nursing. Heightened sebaceous gland activity during pregnancy promotes the enlargement of Montgomery tubercles specifically to ramp up this lubrication ahead of breastfeeding.¹

But lubrication is only half the story, and the more fascinating half involves scent. Research has shown that the secretion from Montgomery glands carries volatile compounds that act as a powerful olfactory signal for newborns. In studies of neonates, the odor of areolar secretion triggered stronger breathing activity and appetitive mouth movements than any other stimulus tested, including the smell of breast milk itself, vanilla, or fresh cow’s milk. These responses appeared to develop independently from any prior experience with the breast, meaning babies who had never nursed still reacted to the scent.² In separate experiments, the volatile compounds from areolar secretions were shown to stimulate mouthing, encourage eye opening, and both delay and reduce crying in newborns.³

In other words, Montgomery glands help a baby find the breast and begin feeding. The scent they produce acts like a chemical homing signal, guiding the newborn during those critical early minutes after birth. This likely plays a role in the initiation of bonding and in establishing successful breastfeeding. From an evolutionary standpoint, it is hard to overstate how important that function would have been before modern medicine, when a newborn’s survival depended entirely on finding the breast quickly.

An Evolutionary Footnote

Montgomery glands are part of a much older anatomical story. The mammary gland itself appears to have evolved from an ancestral apocrine-like gland associated with hair follicles. In monotremes like the platypus, which represent some of the earliest surviving mammals, there are no nipples at all. Instead, a dense cluster of glands opens onto a flat patch of skin, and that cluster likely evolved originally to deliver moisture and protective substances to their permeable, leathery eggs.⁴ Montgomery glands can be thought of as echoes of that ancient structure, oil-secreting glands intertwined with the milk system, sitting on the border between the nipple and the surrounding skin. They are not an accident of anatomy. They have been around, in one form or another, for a very long time.

Changes During Pregnancy and Breastfeeding

If you are pregnant and suddenly notice bumps on your areola that you never paid attention to before, that is one of the most common triggers for searching “are Montgomery glands normal?” The answer is the same, but the reason they become noticeable deserves its own explanation.

During pregnancy, rising hormone levels cause significant changes to the breast, and the areolar glands are not spared. Increased sebaceous gland activity causes Montgomery tubercles to enlarge and become more prominent.¹ In some people, the bumps become large enough to be easily visible and even slightly raised to the touch. The areola itself also tends to darken and expand during pregnancy, which can make the tubercles stand out even more against the skin. A small amount of clear or slightly milky fluid leaking from these bumps is also within the range of normal, especially during the third trimester and while breastfeeding.

After weaning, the glands typically shrink back toward their pre-pregnancy size, though some people notice that their tubercles remain slightly more prominent than they were before. This is normal variation and not a sign of any problem. The timeline for this regression varies and there is no reason to try to speed it along.

Montgomery Glands Are Not Just for Women

One of the more persistent misconceptions is that Montgomery glands are exclusively a feature of female anatomy. They are not. A histological study examining male areolar tissue found definite Montgomery tubercles in multiple cases across a sample of men ranging in age from 42 to 85.⁵ Male Montgomery glands tend to be smaller and less prominent than female ones, and they do not undergo the hormonal enlargement associated with pregnancy, which is why most men never notice them. But the glands are present, and the occasional man who spots a small bump on his areola and panics can take reassurance from this.

Montgomery tubercles can also become noticeable in adolescents of any sex during puberty, when hormonal shifts cause temporary enlargement of breast tissue and increased oil production across the body. In teenage girls especially, these bumps can be among the earliest visible changes during breast development, sometimes appearing before significant breast tissue growth has started.

When Something Might Actually Be Wrong

The overwhelming majority of Montgomery gland concerns turn out to be nothing. That said, there are a few situations where these glands can cause genuine trouble, and it helps to know what to watch for.

Clogged or Cystic Glands

Like any sebaceous gland, a Montgomery gland can become blocked. When the opening gets clogged with oil, dead skin cells, or other debris, a small cyst can form. These are sometimes called Montgomery cysts or cysts of Montgomery. An uninfected cyst is typically painless and may appear as a small, smooth, round lump near the areola. Many go unnoticed or resolve on their own as the gland clears itself.

When one of these cysts becomes infected, the situation changes. An infected cyst can present as a tender, swollen lump with redness of the surrounding areolar skin. In imaging studies, infected cysts appear as round or oval masses containing cloudy fluid with increased blood flow around the edges.⁶ Infected cysts tend to respond well to antibiotics targeting common skin bacteria, along with anti-inflammatory medication to reduce swelling. Invasive procedures like drainage are generally unnecessary unless there are signs of a more serious abscess or the pain is severe.⁶

One reason Montgomery cysts deserve mention is that they can occur in adolescents, and a breast lump in a teenager understandably causes alarm. Infection may actually occur more readily in developing mammary glands during childhood and adolescence.⁶ If your teenager develops a painful bump near the areola, a visit to a doctor is reasonable, but it is worth knowing that Montgomery cysts are benign and rarely need surgery.

Signs That Warrant a Doctor Visit

The tubercles themselves are not dangerous, but changes to the nipple-areolar area can sometimes mimic or mask more serious conditions. It is worth seeing a healthcare provider if you notice any of the following:

• Persistent redness or scaling: Eczema can affect the nipple and areola, and while it is not dangerous, it looks similar enough to a rare condition called Paget’s disease of the breast that it should be evaluated. Nipple eczema poses unique diagnostic considerations compared to eczema elsewhere on the body.
• Bloody or spontaneous nipple discharge: A small amount of clear or milky fluid from Montgomery tubercles during pregnancy or breastfeeding is normal. Bloody discharge from the nipple itself, or spontaneous discharge in someone who is not pregnant or nursing, warrants evaluation.
• A hard, fixed lump: Montgomery cysts are soft, movable, and superficial. A lump that feels hard, does not move easily, or seems anchored to deeper tissue is different from a clogged gland and should be examined.
• Rapid change in appearance: If a Montgomery tubercle that has been stable for months suddenly changes in size, color, or shape, or if new bumps appear that look different from the surrounding tubercles, have it checked.

The key principle is symmetry and consistency. Montgomery tubercles that are roughly similar in appearance across the areola, that have been present for a long time without changing, and that are not painful or discharging strange fluid are almost certainly just Montgomery tubercles doing their job.

Things You Should Not Do to Your Montgomery Glands

Because the internet is full of advice on this topic, much of it bad, it is worth being direct about common mistakes. Do not squeeze Montgomery tubercles to try to express whatever is inside them. Squeezing introduces bacteria from your fingers into the gland opening and can turn a completely normal structure into an infected one. Do not try to pop a Montgomery cyst at home for the same reason.

Do not scrub the areola aggressively during showers in an attempt to reduce the bumps. The tubercles are not caused by inadequate hygiene, and scrubbing strips away the protective oily secretion that the glands are specifically designed to produce. During breastfeeding especially, that secretion is actively protecting your nipple from cracking. Gentle washing with water is sufficient for the areolar area. Soap can be drying, and there is no benefit to trying to clean the glands out.

If you are breastfeeding and notice a white or yellowish spot on a Montgomery tubercle that looks like a blocked pore, warm compresses and gentle massage may help the gland clear on its own. If it does not resolve within a few days, or if it becomes red and painful, see a lactation consultant or your doctor rather than escalating the home treatment.

Cosmetic Concerns and What Can Be Done

Some people find their Montgomery tubercles cosmetically bothersome, particularly if the bumps are large or numerous. This is a legitimate concern that does not require a medical justification. That said, the options for treatment are limited precisely because the glands are normal structures performing a real function.

When areolar sebaceous glands become unusually enlarged (a condition sometimes called areolar sebaceous hyperplasia), treatment is generally cosmetic. Surgical excision is one option, though it is usually reserved for cases involving physical discomfort or unusually large growths. A non-surgical approach using chemical cauterization has also been described in the medical literature.⁷ These are specialized procedures that would be handled by a dermatologist or plastic surgeon, and the first step would be confirming that the bumps in question are indeed enlarged Montgomery glands and not something else.

For people whose tubercles fall within the normal range of size and number but who simply do not like how they look, there is no standard treatment, and most providers will reassure rather than intervene. Cosmetic concerns about Montgomery tubercles can sometimes be amplified by unrealistic media portrayals of breasts, where areolar texture is airbrushed away. In reality, visible Montgomery tubercles are present in the vast majority of adults and are one of the normal features of areolar skin.

Why This Question Comes Up So Often

Montgomery glands occupy an unusual spot in public awareness. Most people never learn about them in school. Breast self-exam education tends to focus on lumps within the breast tissue, not on surface features of the areola. And the glands tend to announce themselves most dramatically during pregnancy, puberty, or hormonal shifts, which are exactly the life stages when a person is already hyper-aware of bodily changes and primed to worry.

The lack of general knowledge about these glands creates a repeating cycle: someone notices the bumps, searches online, finds a mix of reassuring and alarming information, and either worries more or feels silly for not knowing something so basic. Neither reaction is warranted. Montgomery glands are one of many body structures that are unremarkable to medicine but unfamiliar to most people who have them. Their presence is not only normal but functional, actively protecting the areola and, in lactating individuals, helping their baby find food. The bumps on your areola are supposed to be there.