A crusty nipple is usually something drying on the skin or skin that is irritated, not a sign of disease. Pregnancy, breastfeeding, eczema-prone skin and long runs in a cotton shirt account for most cases. The one cause worth ruling out is a slow-growing rash on one nipple that is linked to breast cancer, and it can look a lot like ordinary eczema. The pattern matters more than the crust itself: which nipple, where it started, and whether it heals.
Dried Fluid From Pregnancy, Breastfeeding or Discharge
In the later stages of pregnancy the breasts start making colostrum, the thick early milk a newborn feeds on first.1Momcozy. Crusty Nipples During Pregnancy: What to Know and How to Manage It Small amounts can leak out on their own, mostly near the end of pregnancy.2Momcozy. Crusty Nipples During Pregnancy: What to Know and How to Manage It When it dries, it leaves a yellowish crust on the nipple and the dark skin around it, the areola.3Momcozy. Crusty Nipples During Pregnancy: What to Know and How to Manage It Crust on both nipples late in pregnancy, with no pain or redness, is usually just dried early milk. Dried milk sits on top of normal-looking skin and washes off, while a rash stays red, scaly or sore after the crust is gone.
Early milk often leaks most after a warm shower, after nipple stimulation, or overnight. How much leaks varies a lot, and some pregnant people never leak or crust at all, which is also normal.
To clean it, soften the crust with warm water in the shower rather than picking it off. Pat dry and let the skin air out before putting on a bra. If leaking soaks your clothes, use breast pads and change them when they are damp. Don’t squeeze out early milk before birth to prevent crusting.
Milky discharge, or milk when you are not pregnant or breastfeeding, can come from high levels of the milk-making hormone prolactin.4Yale Medicine. Hyperprolactinemia Constant rubbing or scratching of the nipple can itself raise prolactin, and the leaking fluid can then irritate the skin further.5PubMed Central. Nipple Eczema Causing Galactorrhea by Reactive Hyperprolactinemia, Complicated by a Galactocele Milky crust when you aren’t pregnant or nursing is worth a simple blood test from your doctor.
Some medicines and thyroid problems can also raise prolactin, so a doctor will usually ask about everything you take before deciding what a result means. Leaking from one nipple only, that is bloody, or that comes without squeezing needs a proper check rather than waiting for a hormone result. Squeezing to see whether fluid comes out can keep the discharge going and irritate the skin, so leave the nipple alone and describe what you have noticed.
Eczema, Chafing and Yeast Infections
Nipple eczema makes the nipple and areola red and scaly, and it can itch or hurt.6DermNet. Nipple eczema It may come with eczema elsewhere on the body, or show up on the nipple alone.7DermNet. Nipple eczema Soaps, fragrances, detergents, fabrics and other products can trigger a similar reaction. Heat, sweat, repeated rubbing and chemicals make skin more likely to react this way, which is why it is common in athletes.8PubMed. Contact dermatitis in athletes
During a flare the skin often feels dry and tight, may crack at the fold where the nipple meets the areola, and can weep a clear fluid that dries into a honey-coloured crust. Both nipples are often affected, and the rash often involves the areola from the start rather than beginning on the nipple tip, though this pattern alone can’t rule out Paget’s disease. The skin here is thin, so eczema can sting with hot water, sweat or tight fabric, which is why it often worsens after a shower or workout. A history of eczema or very dry skin, or asthma or hay fever in the family, makes it a likelier explanation, though it can appear without any of these.
Runner’s nipple is chafing from a shirt rubbing the nipple over and over.9Sports Medicine Today. Why Is My Nipple Crusty? Causes and When to Worry It is most often seen in men running long distances in cotton shirts, especially in cool weather.10Sports Medicine Today. Why Is My Nipple Crusty? Causes and When to Worry Rubbed skin can bleed slightly and scab, which dries into crust.
Soreness is usually worst in the shower, when water and soap hit rubbed skin, and it settles over a few days if the rubbing stops. Women get it too, particularly when a sports bra or seam rubs.
Yeast infections of the nipple, usually Candida, are often diagnosed during breastfeeding.11PubMed Central. Breast and Nipple Dermatoses During Lactation They usually affect both nipples, with sharp, shooting or burning pain that seems worse than the skin looks.12PubMed Central. Breast and Nipple Dermatoses During Lactation The nipple and areola may look red and shiny, sometimes spreading onto the breast.13PubMed Central. Breast and Nipple Dermatoses During Lactation Clues include recent antibiotics, past yeast infections, pain starting after feeds were pain-free, or thrush or yeasty nappy rash in the baby.14PubMed Central. Breast and Nipple Dermatoses During Lactation
To tell them apart at home: chafing lines up with where clothing rubs and appears after exercise. Eczema itches and flares with new products or dry weather. Yeast burns, often during and after feeds, and both mother and baby may need treatment.
Duct Problems, Infection and Piercings
In duct ectasia, the milk ducts under the nipple widen, thicken and fill with fluid.15Mayo Clinic. Mammary duct ectasia – Symptoms and causes They can clog with a thick, sticky discharge that is often yellow or green.16Mayo Clinic. Mammary duct ectasia – Symptoms and causes The discharge can also be watery, brown or bloodstained,17Breast Cancer Now. Duct ectasia – Symptoms, Causes and Treatment and the clogged duct can become inflamed.18Mayo Clinic. Mammary duct ectasia – Symptoms and causes
Widened milk ducts are not cancer. They are most often found in women approaching or past menopause, though they can occur at other ages. They can pull the nipple inward or produce a lump behind it, so a new nipple change still deserves a check.
Outside breastfeeding, a blocked duct can lead to long-lasting infection with pockets of pus near the areola.19Primary Care Update for Ob/Gyns. Infectious Diseases Update Mastitis These can drain through the skin on their own and leave crust.20Primary Care Update for Ob/Gyns. Infectious Diseases Update Mastitis Nipple piercings can take 6 to 12 months to heal and raise the risk of infection and abscess.21PubMed Central. A rare breast cancer in a patient with pierced nipples
Some crust during healing is normal, just fluid drying around the jewellery. Clean gently with saline and don’t twist the jewellery. Spreading redness, heat, pus or fever suggests infection and needs a doctor. Don’t remove jewellery from an infected piercing without advice, as that can trap the infection.
Paget’s Disease of the Nipple and Breast Cancer
Paget’s disease of the nipple is a cancer-related skin change that can look like eczema: red, thickened, moist, crusted or scaly.22PubMed Central. Mammary Paget’s Disease of the Nipple: Relatively Common but Still Unknown to Many It usually affects only one breast and comes on slowly over months to years.23PubMed Central. Mammary Paget’s Disease of the Nipple: Relatively Common but Still Unknown to Many It starts on the nipple itself and later spreads to the areola and skin beyond.24Anais Brasileiros de Dermatologia. Mammary and extramammary Paget’s disease It may itch or burn, bleed, ooze straw-coloured or bloody fluid, turn the nipple inward, or come with a lump.25Mayo Clinic. Paget’s disease of the breast: Symptoms and causes
Early on it may be a small patch of dry, flaky skin that seems trivial. Later the skin can become raw or ulcerated and the nipple can flatten or sink in. It does not come and go the way eczema often does, and any improvement tends to be partial and temporary.
That is why it gets mistaken for eczema: both can be red, scaly, crusted and itchy, and eczema creams may soothe Paget’s disease briefly and hide it. A rash on one nipple that slowly eats into the nipple shape is the key warning.
Between 93 and 100 out of 100 people with Paget’s disease have breast cancer underneath, usually close to the areola.26Anais Brasileiros de Dermatologia. Mammary and extramammary Paget’s disease About half have a lump behind the nipple, and in 9 out of 10 of those it is invasive cancer.27nhs.uk. Paget’s disease of the nipple Itching, burning or bleeding on a nipple that looks normal, not red or scaly, is unlikely to be Paget’s disease, though it still deserves a check.28nhs.uk. Paget’s disease of the nipple Men can get it too, but it is extremely rare; male breast cancer is under 0.5% of all breast cancers.29PubMed Central. Paget’s Disease of Nipple in Male Breast with Cancer
The skin change is part of the cancer, not a separate rash, so treating only the surface does not deal with the underlying problem. Having it does not mean the cancer has spread; it is often found while still confined to the breast, and a skin change can lead to earlier discovery than a lump alone. Even when no lump can be felt, imaging may find the cancer underneath. Neither a lack of pain nor a lack of lump rules it out.
Warning Signs That Mean See a Doctor
- Crust or rash on one nipple that doesn’t clear with two weeks of eczema care
- Bloody or straw-coloured discharge, especially from one nipple
- A nipple that has newly turned inward or flattened
- A lump in the breast or armpit, or thickened breast skin
- A sore that bleeds, weeps or won’t heal
- Pus, fever or spreading redness, which suggest infection
Some signs are usually reassuring: both nipples affected late in pregnancy with clear or yellow crust that washes off, chafing that heals within days once you change shirts or cover the nipples, or eczema that clears with moisturiser and a mild steroid cream. Even these warrant a visit if they keep coming back.
Book within a couple of weeks for persistent one-sided changes, and the same week for a lump or bloody discharge. Fever with a hot, painful breast needs urgent care.
What Happens at the Doctor’s Appointment
Your doctor will examine both breasts, even if only one is affected.30nhs.uk. Paget’s disease of the nipple – Diagnosis They’ll ask how long you’ve had symptoms, about breast cancer in you or your family, your age and menopause, medicines including HRT or the pill, alcohol, and weight changes.31nhs.uk. Paget’s disease of the nipple – Diagnosis
The examination covers the nipple and skin with your breasts in different positions, then the breasts, the area behind the nipple and the lymph nodes under the arm and above the collarbone. They may gently press around the nipple to see whether discharge comes out, noting its colour and duct, so it helps not to squeeze beforehand. Comparing both sides matters, since a change on one side carries more weight than something on both.
If cancer is a concern you’ll be referred to a breast clinic for a mammogram and ultrasound.32nhs.uk. Paget’s disease of the nipple – Diagnosis Ultrasound is the first test for younger, pregnant or breastfeeding women.33nhs.uk. Paget’s disease of the nipple – Diagnosis It can help tell harmless nipple lesions from cancerous ones and guide a needle sample.34PubMed Central. Nipple Ultrasound: A Pictorial Essay Paget’s disease may show extra blood flow in the nipple on an ultrasound, which can be one clue, but only a biopsy confirms it.35PubMed Central. Sonographic visualization of nipple blood flow can help differentiate Paget disease from benign eczematous nipple lesions If Paget’s disease is suspected, a small skin sample taken under local anaesthetic confirms it.36nhs.uk. Paget’s disease of the nipple – Diagnosis If discharge is suspicious and the mammogram and ultrasound are normal, an MRI scan may be offered.37PubMed Central. Breast imaging in patients with nipple discharge
A mammogram presses each breast briefly between two plates, which can be uncomfortable but takes only a few minutes per breast. An ultrasound is painless and can be done on the same visit. Results from a needle or skin sample usually take some days.
To prepare, take photos of the nipple over a few days, and note which side, when it started and any discharge colour. List creams, soaps and medicines you’ve tried. Mention pregnancy or breastfeeding, as it changes which tests are used.
How to Treat and Prevent a Crusty Nipple
Steroid creams, especially ointments, are the main treatment for nipple eczema and absorb well through thin areola skin.38DermNet. Nipple eczema Mild ones suit mild eczema, with stronger ones for severe or stubborn cases.39DermNet. Nipple eczema Steroid creams and some non-steroid prescription creams are both considered safe while breastfeeding.40PubMed. Nipple eczema: A systematic review and practical recommendations Moisturising regularly helps repair the skin barrier and eases pain and itch,41DermNet. Nipple eczema and moisturising wash products instead of soap help too.42PubMed. Nipple eczema: A systematic review and practical recommendations
Apply a thin layer once or twice a day to the affected skin only, using the lowest strength that works. If breastfeeding, ask the doctor or pharmacist about timing, such as applying after a feed and wiping off remaining cream before the next. If the skin hasn’t improved in the period they gave, go back, because a rash that doesn’t respond needs a second look rather than a stronger cream.
Preventing flare-ups means avoiding known irritants, allergens and repeated friction.43DermNet. Nipple eczema44PubMed. Nipple eczema: A systematic review and practical recommendations Breastfeeding mothers may benefit from nipple shields and adjusting the baby’s latch.45PubMed. Nipple eczema: A systematic review and practical recommendations Warm water or black tea compresses can ease discomfort.46PubMed. Nipple eczema: A systematic review and practical recommendations
For everyday protection, choose soft, breathable fabrics and rinse new clothes before wearing them. Use fragrance-free detergent and skip fabric softener if you suspect a reaction, since residue stays in clothes. Keep showers short and lukewarm, pat skin dry, and moisturise while it is still slightly damp.
To prevent runner’s nipple, wear smooth synthetic technical fabrics instead of cotton, and apply petroleum jelly or anti-chafe balm before long runs. Cover nipples with tape or plasters on race days. Afterward, wash and moisturise, and let scabs heal before the next long run.
A nipple yeast infection needs an antifungal cream from a doctor or midwife. Treat the baby’s mouth at the same time so it isn’t passed back and forth. Keep nipples dry and change damp breast pads often. Steroid creams alone won’t fix yeast and can make it worse.