Most bumps on the nipple and the surrounding areola are Montgomery glands, tiny sebaceous structures that are a completely normal part of breast anatomy. Nearly everyone has them, typically somewhere between four and twenty-eight small raised dots scattered across each areola, and they become more visible during hormonal shifts such as puberty, pregnancy, or arousal. While these glands account for the vast majority of what people notice when they look in the mirror and wonder why their nipple looks bumpy, a handful of other conditions can also cause bumps in the area, and a few of them do warrant a visit to a doctor.
Montgomery Glands and What They Do
Montgomery glands (sometimes called Montgomery tubercles, or more formally, glands of Montgomery) are small oil-producing glands embedded in the areola. They secrete a thin, oily fluid that keeps the nipple and areola moisturized and mildly protected from friction and drying out. The glands look like slightly raised, skin-colored or pale dots, and they can become more pronounced when the nipple is stimulated, when the skin is cold, or during hormonal changes.
Research on lactating women has revealed that these glands do more than just lubricate. A study published in PLoS ONE found that the secretion from Montgomery glands in breastfeeding mothers intensified newborns’ breathing and feeding-related mouth movements more than any other stimulus tested, including breast milk and other body odors. The newborns’ responses appeared to develop without any prior experience with the breast, suggesting the glands produce volatile compounds that help guide a baby toward the nipple and may play a role in early bonding and milk transfer.1PubMed Central. The secretion of areolar (Montgomery’s) glands from lactating women elicits selective, unconditional responses in neonates
If you notice these small dots becoming more prominent, that shift is almost always hormonal and harmless. Pregnant women frequently report that their Montgomery glands seem to “pop up” or enlarge, which is the body preparing the areola for breastfeeding. They typically become less noticeable again after nursing ends or after the hormonal trigger passes.
Milk Blebs During Breastfeeding
Breastfeeding introduces a specific kind of bump that can be alarming if you are not expecting it: the milk bleb, also called a nipple bleb or milk blister. A milk bleb is a small, white or yellowish spot on the surface of the nipple, usually at the tip of a milk duct opening. It forms when a thin layer of skin grows over a duct or when thickened milk blocks the opening. The result is a tiny, often painful bump that can make nursing uncomfortable.
Management typically starts with adjusting breastfeeding technique. Positions that encourage better breast emptying and starting feeds on the affected side (so the baby’s strongest suction works on the blockage) are first-line approaches. Warm compresses, light application of food-safe oil like olive or coconut oil to soften the overlying skin, and gentle hand expression between feedings can all help. Many lactation consultants also suggest warm Epsom salt soaks using a flexible milk-collection container, though formal evidence for this practice is limited.2Journal of Obstetric, Gynecologic & Neonatal Nursing. Case Report of the Management of Milk Blebs
One thing to be cautious about is picking at or “unroofing” a bleb yourself. Opening the skin over a blocked duct creates a point of entry for bacteria, and blocked ducts are already associated with mastitis. If a bleb does not resolve with conservative measures, a healthcare provider can lance it using sterile technique or prescribe a topical steroid to reduce scar tissue buildup at the site. If signs of infection develop, such as redness, warmth, or fever, antibiotics appropriate for breastfeeding should be started promptly to prevent an abscess.2Journal of Obstetric, Gynecologic & Neonatal Nursing. Case Report of the Management of Milk Blebs
Contact Dermatitis and Nipple Eczema
The nipple and areola are covered in skin, and that skin can develop the same conditions as skin anywhere else on your body, including eczema and allergic reactions. Contact dermatitis of the nipple is an inflammatory reaction triggered by direct contact with an allergen or irritant, such as laundry detergent, fabric softener, nickel in a bra’s underwire, or ingredients in lotions and body washes. It often shows up as itchy, red, sometimes bumpy or flaky patches on or around the nipple.
What makes nipple eczema tricky is that it can closely mimic other conditions. Allergic contact dermatitis of the nipple has been noted to look clinically similar to both atopic dermatitis and, more seriously, Paget’s disease of the breast, a form of cancer. Patch testing can identify the specific allergen in cases of contact dermatitis, which helps distinguish it from other conditions.3PubMed Central. Nipple eczema: a diagnostic challenge of allergic contact dermatitis If you have persistent nipple eczema that does not respond to standard treatments like removing suspected irritants and applying an over-the-counter hydrocortisone cream, it is worth getting a professional evaluation rather than assuming it is just dry skin.
Thrush and the Overdiagnosis Problem
Breastfeeding parents are often told that burning or stinging nipple pain combined with a shiny, reddened appearance means they have thrush, a Candida yeast infection. You may have been prescribed antifungal creams or oral antifungals for this diagnosis. The evidence behind this common clinical practice is surprisingly thin.
A review examining the relationship between Candida species and the symptoms typically diagnosed as “mammary candidiasis” found little evidence that Candida on the nipple or in breast milk actually causes those symptoms. Candida species, including C. albicans, are commonly found in healthy breast milk and on the nipple-areolar skin of women without any symptoms at all. The review also found no evidence that antifungal treatments work better than simply waiting for symptoms to resolve on their own.4Women’s Health. Overdiagnosis and overtreatment of nipple and breast candidiasis: A review of the relationship between diagnoses of mammary candidiasis and Candida albicans in breastfeeding women
This does not mean yeast infections of the nipple never happen. But it does mean that when you see bumps, redness, or experience pain in the nipple area during breastfeeding, reaching for antifungals as a default may not be the right first step. Other causes, including bacterial infection, poor latch mechanics, or the contact dermatitis discussed above, should be considered alongside yeast.
Cysts and Other Benign Lumps
Epidermoid cysts are among the most common benign skin lumps on the body. They are slow-growing, firm nodules that form when surface skin cells get trapped beneath the skin and accumulate keratin. While they can pop up virtually anywhere, an epidermoid cyst directly on the nipple or areola is quite rare. When they do appear in this location, they can be more prone to complications like infection or rupture than cysts elsewhere on the body. One reported case involved a woman who noticed a mass on her left nipple during bathing; it turned out to be a confirmed epidermoid cyst that was treated with local excision.5PubMed Central. Breast epidermoid cyst: a case report
Intraductal papillomas are another benign cause of lumps near the nipple. These are small, wart-like growths that arise inside a milk duct, usually close to the nipple. The most common symptom is nipple discharge that may be clear or blood-tinged, sometimes accompanied by a palpable lump. One case report described a woman who had papillary lesions and nipple discharge for twenty years before imaging revealed an irregular mass at the nipple.6PubMed Central. Multimodal Ultrasound Manifestations of a Central Intraductal Papilloma at the Nipple and Its Causes of Misdiagnosis While intraductal papillomas are not cancerous, they can be hard to distinguish from malignancies on imaging alone, which is why persistent nipple discharge or a new lump near the nipple is always worth getting checked.
Hidradenitis Suppurativa Near the Areola
Hidradenitis suppurativa (HS) is a chronic inflammatory skin condition that typically affects areas with many sweat glands and hair follicles, like the armpits and groin. On the breast, HS more commonly appears in the fold underneath the breast. But it can occasionally develop in the periareolar area, meaning right around the areola. Because the location is unusual for HS, it often isn’t immediately considered as a diagnosis, which can delay treatment.7PubMed Central. Hidradenitis suppurativa of the breast: a diagnostic dilemma
HS around the areola may present as painful, deep-seated bumps that can drain fluid and sometimes leave scarring or sinus tracts over time. If you have recurring painful lumps around the areola that flare and subside, especially if you also have HS elsewhere on the body, it is worth raising the possibility with your dermatologist or surgeon.
Paget’s Disease of the Nipple
Paget’s disease of the breast is the rare condition that genuinely does warrant worry, and it is the main reason dermatologists and breast surgeons emphasize that persistent nipple changes need evaluation. Paget’s disease is an adenocarcinoma of the nipple’s surface skin, and it is clinically defined as inflammation of the nipple area that can look remarkably like eczema.8PubMed Central. Mammary Paget’s Disease of the Nipple: Relatively Common but Still Unknown to Many It may appear as a scaly, crusty, or reddened patch on the nipple that itches or burns, sometimes with bloody discharge. The resemblance to simple eczema or dermatitis is its most dangerous feature: people can live with it for months or years thinking it is a minor skin issue.
In one reported case, Paget’s disease presented as a pruritic rash with skin changes while all breast imaging appeared normal, meaning a mammogram alone was not enough to catch it.9PubMed Central. Invasive Paget’s Disease of the Breast: Rash or Recurrence? Another case involved a patient with a long history of what had been managed as nipple eczema before Paget’s disease with underlying invasive breast cancer was finally diagnosed.10PubMed Central. Invasive breast cancer with Paget’s disease: A rare case report from a tertiary facility in Northern Tanzania
The practical takeaway: any eczema-like change on the nipple that affects only one side, does not respond to standard topical treatments within a few weeks, or keeps coming back should be biopsied. Paget’s disease is uncommon, but its survival outcomes are much better when caught early, and the diagnostic threshold is a simple skin biopsy rather than an invasive procedure.
Other Rare Skin Cancers of the Nipple
Basal cell carcinoma is the most common skin cancer overall, but on the nipple and areola it is exceedingly rare. When it does occur there, it is more commonly seen in older men. It may present as a pearly or pigmented bump that grows slowly.11PubMed Central. Pigmented Basal cell carcinoma of nipple and areola in a male breast – a case report with review of literature Because the nipple is not a common site for this cancer, and because people may not think of the areola as an area that can develop skin cancer, these lesions can go unnoticed or undiagnosed for a long time. Any new, persistent, or changing bump on the nipple that does not fit the description of normal anatomy is worth having a clinician look at, even in men.
Bumps and Changes on Male Nipples
Men have Montgomery glands too, and most nipple bumps in men are just as benign as they are in women. However, men can also develop gynecomastia, an enlargement of breast tissue driven by hormonal imbalances. Gynecomastia itself does not always cause visible bumps on the nipple, but it can make the nipple area feel lumpy, tender, or swollen.
The causes of gynecomastia range widely. Roughly a quarter of cases have no identifiable cause. Physiological hormonal shifts (during puberty or aging) account for about a fifth, pathological causes like liver disease or hormonal tumors for about a third, and medications for somewhere between one in ten and one in five cases. Drugs known to trigger gynecomastia include spironolactone (a blood-pressure and fluid-retention medication), digoxin, and certain psychiatric medications. In one case, a 68-year-old man on spironolactone and digoxin developed painful breast swelling and discharge from both nipples.12InaJEMD – Indonesian Journal of Endocrinology Metabolic and Diabetes. Gynecomastia and Galactorrhoea in Male Older Patients: Distinguish Between Drug Induced or Prolactinomas? If you are a man experiencing new breast tenderness or swelling, checking whether any medications you take are associated with gynecomastia is a reasonable first step before assuming anything more serious.
Vascular Spots and Developmental Variations
Cherry angiomas are small, bright-red or purple spots made up of clusters of tiny blood vessels. They are extremely common across the body, especially with age, and they can occasionally appear on or near the areola. A case report documented a cherry angioma co-existing with another vascular skin condition on the breast, which had not been previously described.13PubMed Central. Late onset angioma serpiginosum of the breast with co-existing cherry angioma Cherry angiomas are benign and do not require treatment unless they bleed from friction or you find them cosmetically bothersome.
Another variation that can look unusual is the supernumerary nipple, sometimes called a third nipple or accessory nipple. These develop along the embryonic “milk line,” a path that runs from the armpit to the groin on each side of the body. Supernumerary nipples are present from birth and can be identified early, though they are sometimes mistaken for moles because they can be quite small.14PubMed. Ectopic breast tissue, supernumerary breasts, and supernumerary nipples They are more common than most people realize, and they are harmless in the vast majority of cases. If you have a small bump somewhere along the line from your armpit to your lower abdomen that has been there since childhood and has never changed, it may well be one.
A Practical Guide to When Something Needs Attention
Given the range of causes, from the completely normal to the very rare but serious, here are the features that should prompt you to see a healthcare provider rather than waiting:
- One-sided changes: A rash, scaling, or crusting that affects only one nipple is more suspicious than bilateral changes, which are more likely to reflect eczema or a systemic cause.
- Persistent eczema: A scaly or crusty patch on the nipple that does not improve after two to three weeks of standard eczema treatment (moisturizing, removing irritants, mild steroid cream) needs a biopsy to rule out Paget’s disease.
- Bloody discharge: Clear or milky nipple discharge has many benign explanations. Discharge that is blood-tinged or occurs spontaneously from one duct warrants imaging and possibly further workup.
- New, growing, or changing lumps: A bump that was not there before, that is getting bigger, or that changes color or texture over weeks should be evaluated.
- Pain with signs of infection: Redness, warmth, swelling, and fever, especially during breastfeeding, suggest mastitis or abscess and need prompt treatment.
Most of the time, bumps on the nipple turn out to be Montgomery glands doing exactly what they were designed to do, or a minor skin condition that resolves with simple measures. The reason clinicians still encourage evaluation for persistent or unusual changes is that the one serious condition in this area, Paget’s disease, deliberately disguises itself as something ordinary. Catching it early makes a meaningful difference in outcomes, and the initial diagnostic step is straightforward.