Nipple soreness almost always comes down to one of a handful of causes: hormonal fluctuations tied to your menstrual cycle, friction from clothing or exercise, irritation from breastfeeding, or a skin condition like eczema. Less commonly, an infection, a medication side effect, or a more serious underlying condition can be responsible. The fact that so many different triggers share the same symptom is why figuring out which one applies to you matters more than just knowing the soreness is “normal.”
Hormonal Shifts and Cyclic Breast Pain
If your nipple soreness shows up on a predictable schedule, rising in the days before your period and fading once it arrives, hormones are the most likely explanation. This pattern, sometimes called cyclic mastalgia, is one of the most common breast complaints. The relationship between specific hormones and breast pain is more nuanced than the old explanation of “estrogen goes up, breasts hurt.” Research on female athletes who tracked daily hormone levels alongside breast pain found that higher levels of both estradiol and progesterone were actually associated with a lower likelihood of reporting breast pain. A rise in progesterone was linked to lower pain severity as well. But the two hormones interacted with each other, meaning the effect of one depended on the level of the other.
Earlier work found a somewhat different angle: women with cyclic breast pain tended to have lower progesterone levels during the luteal phase (the second half of the cycle) compared to women without symptoms, along with an exaggerated prolactin response.
What does that mean practically? The hormonal picture behind cyclic nipple and breast soreness is not as simple as “too much estrogen.” It involves a shifting balance between estrogen, progesterone, and possibly prolactin, and the balance that triggers pain in one person might not in another. If your soreness reliably tracks your cycle, that hormonal interplay is almost certainly the driver. Hormonal contraceptives and hormone replacement therapy can also trigger or worsen the pattern, since they alter the same hormonal landscape.
Breastfeeding and Nipple Trauma
For people who are nursing, sore nipples are so common that many assume they are an inevitable part of the process. They are not. The single most frequent cause of nipple pain during breastfeeding is trauma from improper positioning and latch. That trauma can range from redness and swelling to cracks, blisters, and open fissures.
A Cochrane review on the topic concluded that because nipple trauma so often results from poor latching or positioning, the most effective intervention is hands-on breastfeeding support immediately after delivery, ideally before pain develops in the first place.
Once cracks or fissures form, they create an entry point for bacteria. Research has shown that mothers with moderate to severe nipple pain who also had visible cracks or fissures had roughly a 54% chance of Staphylococcus aureus colonization on the skin. The risk of S. aureus was nearly five times greater when the skin was broken compared to when it was intact. Left untreated, this can progress to mastitis. One study found that mastitis developed in roughly 12% to 35% of mothers with infected sore nipples who were not given systemic antibiotics, compared to about 5% of those who were.
If you are breastfeeding and your nipple pain persists despite correcting your latch, a bacterial infection is worth considering. Symptoms of deeper infection can include aching deep in the breast, tenderness on palpation, and visible nipple lesions.
What About Thrush?
You may have been told that a yeast infection (Candida) on the nipple or in the milk ducts is a common cause of burning, shooting breast pain during breastfeeding. The evidence for this is surprisingly thin. A review examining the relationship between Candida and breastfeeding pain found that studies consistently failed to recover meaningful amounts of yeast from symptomatic women’s breast milk. In one study, only a single milk sample out of 32 from symptomatic mothers grew a colony of Candida albicans, while none of the 36 samples from pain-free mothers grew any. Another study found yeast in about 30% of women with sharp, shooting breast pain but also in about 8% of women with no symptoms at all.
This does not mean nipple thrush never occurs, but it does suggest that the diagnosis has been applied far more broadly than the microbiology supports. If you have been treated for thrush repeatedly without improvement, the actual cause of your pain may be something else entirely: bacterial infection, vasospasm, or dermatitis.
Vasospasm and Raynaud’s Phenomenon of the Nipple
Some breastfeeding parents experience intense, burning nipple pain that strikes after a feeding session rather than during it, often accompanied by the nipple turning white, then blue, then red. This is nipple vasospasm, a painful constriction of the small blood vessels in the nipple. In some people it represents Raynaud’s phenomenon affecting the nipple rather than the more familiar fingers and toes.
A study of 12 women with extremely painful breastfeeding found that all of them had symptoms triggered by cold temperatures and showed the classic color changes (blanching followed by cyanosis or redness). Half had also experienced the symptoms during pregnancy, before breastfeeding even began. Vasospasm is diagnosed primarily by observing the color change and noting that cold exposure triggers it.
This cause is worth knowing about because it is frequently misdiagnosed as thrush, leading to rounds of antifungal treatment that do nothing. Avoiding cold exposure, warming the nipple immediately after feeding, and in some cases taking a vasodilator prescribed by a doctor can make a real difference.
Friction, Exercise, and “Jogger’s Nipple”
If you are not breastfeeding and your nipple soreness is not cyclical, friction is one of the first things to consider. Repetitive rubbing from clothing, especially during exercise, can irritate the nipple enough to cause redness, chafing, and even bleeding. Runners are particularly prone to this, and the problem is common enough to have its own informal name. Prevention comes down to reducing the friction: moisture-wicking fabrics, lubricants or adhesive covers over the nipples, and properly fitting clothing.
The role of breast support during exercise goes beyond just comfort. Research that measured breast movement during running, jogging, aerobics, and walking found that wearing a sports bra reduced both the vertical distance breast tissue moved and the deceleration forces on the breast. Perceived pain dropped correspondingly. A well-fitted sports bra outperformed fashion bras and crop tops on every measure. If your soreness flares around workouts, inadequate support is a likely culprit, and the fix is straightforward.
Nipple Piercings and Infection Risk
Nipple piercings introduce a foreign body through a sensitive area with relatively poor airflow, which creates ongoing infection risk. A systematic review of case reports involving bacterial infections after nipple piercings found that the breast was the most commonly affected organ, with pain, redness, swelling, and fluid collection being the most frequent findings. The pathogens involved were often unusual organisms not typically seen in breast infections, including atypical mycobacteria and anaerobes, which can make diagnosis and treatment more complicated than a standard skin infection.
If you have a nipple piercing and develop persistent soreness, warmth, swelling, or discharge, those symptoms deserve medical attention rather than a wait-and-see approach. Infections around piercings can progress to abscesses that require drainage.
Nipple Eczema and Contact Dermatitis
The skin of the nipple and areola is thinner and more sensitive than the surrounding breast skin, which makes it a common site for eczema. A systematic review found that nipple eczema can take several forms: atopic eczema (related to a broader tendency toward allergic conditions), irritant contact eczema (from repeated friction or harsh products), and allergic contact eczema (a true allergic reaction to a specific substance). Common culprits for allergic contact eczema on the nipple include fragranced soaps, laundry detergents, fabric softeners, and certain bra materials.
Nipple eczema typically presents as itching, flaking, or cracking skin on or around the nipple, sometimes with oozing or crusting. Avoiding the provoking factor is the first line of management. Switching to fragrance-free laundry products, wearing cotton bras, and using a gentle moisturizer can resolve many cases without prescription treatment. Persistent or worsening eczema that does not respond to these changes warrants a dermatology visit, partly because the appearance can occasionally overlap with a more serious condition discussed below.
Nipple Soreness in Men and Adolescent Boys
Nipple pain is not exclusively a concern for women. In adolescent boys, the most common cause is pubertal gynecomastia, a temporary swelling of breast tissue that often makes the nipples tender or sore. This happens because of a temporary imbalance between estrogen and androgen activity in the breast tissue during puberty. Estrogen stimulates breast tissue growth, while rising testosterone levels eventually suppress it. During the window when estrogen activity is relatively high but testosterone has not yet caught up, breast tissue can enlarge enough to cause discomfort.
Some research has found that many adolescents with pubertal gynecomastia actually have normal circulating estrogen levels, suggesting that the breast tissue itself may be unusually sensitive to normal amounts of estrogen or that local conversion of androgens to estrogen within the breast plays a role. In most cases the swelling and tenderness resolve on their own as puberty progresses and androgen levels rise.
In adult men, nipple soreness associated with breast tissue enlargement can be triggered by medications (certain antihypertensives, antidepressants, and anti-androgens are well-known culprits), obesity (fat tissue contains aromatase, the enzyme that converts androgens to estrogen), liver disease, and rarely, hormone-producing tumors. Any new, persistent nipple soreness or breast enlargement in an adult man should be evaluated, especially if it is one-sided.
Shingles on the Breast
One overlooked cause of nipple and breast pain is herpes zoster, better known as shingles. The varicella-zoster virus can reactivate along the nerves that supply the chest wall, producing pain that is often described as burning or stabbing. In a small case series of women diagnosed with thoracic shingles who initially presented with breast pain, every patient reported pain, about 70% developed the characteristic rash, and 60% described a burning sensation. Because the pain can precede the rash by days, it is sometimes mistaken for other causes of breast pain before the blisters appear.
Shingles-related breast pain tends to affect one side only, follow a band-like distribution along the rib cage, and feel different from the dull ache of cyclic hormonal pain. If you develop sharp or burning pain on one side of the chest or breast that seems out of proportion to anything visible on the skin, shingles is worth mentioning to your doctor.
When Nipple Changes Need Medical Attention
The vast majority of nipple soreness is benign, but a few patterns should prompt a visit to a healthcare provider sooner rather than later. Mammary Paget’s disease is an uncommon form of breast cancer that presents as skin changes on the nipple: persistent redness, scaling, crusting, or eczema-like irritation that does not heal. It accounts for roughly 1% of breast cancer cases, and more than 90% of the time it is associated with an underlying breast carcinoma, either in situ or invasive.
The challenge is that early Paget’s disease can look a lot like simple eczema or dermatitis, which is why it sometimes goes undiagnosed for months. The key difference is persistence and non-response to treatment. Nipple eczema that does not improve with standard topical care, that affects only one nipple, or that is accompanied by nipple flattening, discharge, or a palpable lump beneath the areola warrants a biopsy to rule out Paget’s disease.
Bloody nipple discharge is another symptom that tends to alarm people, though it is not always serious. In young children, mammary duct ectasia (a benign dilation of the milk ducts) can cause it and typically resolves on its own. In adults, bloody discharge can have benign causes like an intraductal papilloma, but it should always be evaluated because it is also an occasional presentation of ductal carcinoma.
Practical Relief Strategies
What actually helps depends on the cause, but several approaches have evidence behind them or are low-risk enough to try while you figure things out.
For breastfeeding-related soreness, the most effective single intervention is correcting the latch and positioning. A study comparing glycerin gel dressings, lanolin, and standard care found that all three groups healed at similar rates, suggesting that the assessment and correction of breastfeeding technique mattered more than which topical product was used. In fact, a separate trial comparing lanolin to simply applying expressed breast milk to the nipple after each feeding found that the breast milk group healed faster than the lanolin group.
For cyclic hormonal pain, some dietary supplements have been studied. A trial comparing flaxseed, evening primrose oil, and vitamin E found that flaxseed was the only supplement to produce a statistically significant reduction in the duration of breast pain over two months. Evening primrose oil showed a trend toward improvement but did not reach significance, and vitamin E showed no meaningful effect. A rigorous double-blind trial of evening primrose oil and fish oil for severe chronic breast pain found that neither offered clear benefit over placebo oils.
For friction-related soreness, prevention works better than treatment. Petroleum jelly or anti-chafe balms applied before exercise, adhesive nipple covers, and wearing a properly fitted sports bra are the standard recommendations. Once the skin is irritated, keeping it clean, dry, and protected from further friction usually allows healing within a few days.
For nipple eczema, identifying and removing the irritant or allergen is the most important step. A short course of over-the-counter hydrocortisone cream can calm a flare, but if you find yourself reaching for it repeatedly, you are treating the symptom rather than the cause, and a patch test through a dermatologist can help pinpoint what you are reacting to.
Medications That Can Cause Nipple Soreness
A number of prescription and over-the-counter drugs can cause nipple tenderness or breast pain as a side effect, and this is a cause that people frequently overlook. Hormonal medications are the most obvious: combined oral contraceptives, hormone replacement therapy, and fertility drugs that alter estrogen or progesterone levels can all trigger breast and nipple sensitivity. But several non-hormonal medications are also known contributors. Certain antidepressants (particularly SSRIs), spironolactone (a blood pressure and acne medication with anti-androgen properties), and some antipsychotics that raise prolactin levels can all cause breast tenderness or gynecomastia. In men, finasteride (used for hair loss and prostate enlargement) and anabolic steroids are common culprits. If your nipple soreness started around the time you began a new medication, that connection is worth discussing with your prescriber before assuming the cause is something else.
Temperature, Dryness, and Seasonal Patterns
Cold weather can cause nipple pain even outside of the Raynaud’s phenomenon described earlier. The nipple has smooth muscle fibers that contract in response to cold, causing the nipple to become erect. In cold or windy conditions, this contraction combined with dry air and the friction of heavier winter clothing can make nipples noticeably sore, even in people who have no issues during warmer months. Dry indoor heating during winter strips moisture from the skin and can worsen cracking or chapping on the nipples and areolae. Using a plain, fragrance-free moisturizer and wearing a soft cotton layer against the skin during cold months helps prevent this seasonal pattern. If your nipple pain is strictly worse in winter and involves visible color changes when exposed to cold, the vasospasm mechanism is worth investigating with a doctor, since targeted treatment exists.