When does a nipple rash need checking?
Get a nipple rash checked if it will not settle, if it affects one side only, or if the nipple has changed in some other way. Eczema and irritation cause most of these rashes. Several other conditions look almost the same, so the pattern matters far more than the appearance.
A rash on the nipple itself needs more attention than one on the skin around it. A change on one side only is a useful clue, though it proves nothing on its own. NICE, which covers England, tells clinicians to consider a suspected cancer pathway referral when skin changes could point to breast cancer. There is no set number of weeks you must try a cream before asking for an assessment.
Mammary Paget’s disease, also called Paget’s disease of the breast, is an uncommon breast cancer that can look like an ordinary skin problem. It affects the nipple and the darker skin around it, known as the nipple-areola complex. A clinician works out the cause from the whole picture, and from a tissue test where one is needed.
Eczema and Paget’s disease can look the same
Nipple eczema comes in three forms: atopic eczema, irritant contact eczema and allergic contact eczema. Rubbing from clothing, soaps and other chemical products, and allergens can all set it off or make it worse. It usually itches, and the skin can flake, redden or crust.
Paget’s disease produces very similar changes on the nipple, including itching and flaking. That overlap is the reason a rash cannot be judged by how it looks.
The table below sets out the clues a clinician weighs up, and shows why each one can point in either direction.
| Clue | What it looks like with eczema or irritation | What raises the question of Paget’s disease |
|---|---|---|
| Where the rash started | Irritation tends to start on skin that rubs or meets a product, often the areola or the skin under the breast. | Paget’s disease usually starts on the nipple itself and spreads outwards onto the areola. |
| One nipple or both | Eczema often affects both nipples, because whatever triggers it usually touches both. | Paget’s disease almost always affects one nipple only. |
| Itching and flaking | Eczema itches, flakes and often settles within days once the trigger is removed. | Paget’s disease itches and flakes in the same way, so this symptom separates nothing. |
| How it answers to steroid cream | Eczema usually calms down, and stays calm once the cause is dealt with. | A rash that clears and comes back, or never fully clears, still needs looking at. |
How a rash answers to a cream is useful information rather than proof. If the cause is still unclear afterwards, the next step is an examination, and sometimes imaging or a skin biopsy.
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Book a ConsultationDischarge, retraction and a change of shape all matter
What the nipple does alongside the rash tells a clinician more than the rash on its own. A rash that will not settle, together with discharge, a nipple that has pulled inwards, or skin that has changed, is worth a GP appointment or a private breast assessment.
Details worth reporting include:
- Nipple discharge: whether any discharge has appeared, and whether it comes from one nipple.
- Retraction or inversion: a nipple that has pulled inwards or changed its usual shape.
- Where the rash sits: whether it began on the nipple or on the areola around it.
- How it has behaved: whether it has stayed, come back repeatedly, or spread across the nipple area.
- Anything else in the breast: a lump, or a change in the breast skin.
NICE advises a suspected cancer pathway referral for people aged 50 or over when one nipple has discharge, retraction or another change of concern. The clinician decides whether that route fits what the examination finds.
A rash is reason enough on its own, with or without a lump. What drives the decision is the pattern of symptoms and the uncertainty around the cause.
Note whether the rash began on the nipple or on the areola around it. That single detail gives the clinician useful context during the examination.
A breast clinic can settle the question
An assessment starts with your account of the rash. The clinician asks where it began, how long it has been there, what you have already tried, and whether discharge or a change of shape has appeared.
Mr Ghosh assesses nipple symptoms in one place, combining examination, imaging and, where it is needed, a biopsy.
Examination and imaging
The clinician looks closely at the nipple and areola, then checks the rest of the breast. A mammogram uses X-rays to look at breast tissue. A breast ultrasound uses sound waves to look at one area in more detail.
Imaging can pick up changes inside the breast that need further investigation. Mammary Paget’s disease can occur alongside ductal carcinoma in situ, which means cancer cells held inside the milk ducts, or invasive ductal carcinoma, where cancer has grown out into the surrounding breast tissue.
A clear scan does not close the question while the nipple skin still looks suspicious. Imaging examines the breast, and a biopsy examines the skin.
When a biopsy is needed
A skin biopsy or nipple biopsy takes a small sample of skin and examines it under a microscope. It is the test that can name the cause when the history, the appearance and the examination still leave doubt.
The sample shows whether the change is eczema, Paget’s disease or something else. A swab may be taken as well where another skin cause looks likely.
Take a list of the creams and treatments you have used, and how the rash responded to each. Add any discharge, change of nipple shape, spread, or lump.
You can stop guessing once someone looks at it
You cannot settle this at home. What helps is turning up with the detail: where the rash started, whether it is on one side or both, how it has changed, and which creams or treatments you have used.
Three questions are worth asking. Is a breast assessment right for these symptoms? What would a mammogram or breast ultrasound show in my case? When would a skin biopsy give a clearer answer?
Uncertainty is a good enough reason in itself. Your GP can assess the symptoms and arrange an NHS referral, and a private breast consultation gives you direct access to an assessment.
Comparing photographs online cannot tell you which of two similar conditions you have. A short examination by someone who sees these rashes every week usually can.
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Book ConsultationCommon questions about nipple rashes
Can Paget’s disease itch like eczema?
Yes. It can itch, flake and crust in much the same way, which is why the two are so easily confused. The difference usually shows in where the rash started and whether it affects one nipple or both.
Can a nipple rash affect both sides?
Yes. Eczema and irritation often affect both nipples, because whatever triggers them usually touches both. A rash on one nipple only is the pattern that raises more questions.
What information should I take to my appointment?
Tell the clinician where the rash started, whether it has persisted or come back, and which treatments you have tried. Mention any discharge, inversion, retraction or lump.
Will a mammogram show the cause of a nipple rash?
Not on its own. A mammogram and a breast ultrasound examine breast tissue and form part of the assessment, but a suspicious change in the nipple skin usually needs a biopsy before the cause can be named.
When is a nipple biopsy considered?
A clinician may consider one when the cause is still unclear after the history, the examination and any imaging. The biopsy examines a small sample of the affected skin under a microscope.
This is general information, not medical advice.
Reviewed by Mr D. B. Ghosh, Consultant Breast Surgeon, dual European Board certified (FEBS) in Breast Surgery and Surgical Oncology, and Board Certified in Cosmetic Breast Surgery through the Royal College of Surgeons scheme. GMC 4657664.
