Why Do I Have a Rash on My Breast?

Medically Reviewed by Poonam Sachdev on August 27, 2024
22 min read
When Your Breast Cancer Turns MetastaticDon't stress yourself out with endless online searches. Trust your oncologist to give you the latest research on the metastatic stage.299

DELTRA JAMES: Hi, I'm Deltra.

And I've been living

with metastatic breast cancer

since 2019.

I'm here to share some tips

on what to do when your breast

cancer has progressed

to the metastatic stage.



[MUSIC PLAYING]





Some ways to select a doctor

that's best

for your metastatic treatment

is word of mouth.

You can ask friends and family

who have experience with cancer

and live in your area, who they

were treated by,

and get recommendations.

You can also get a referral

from your primary physician

because they may know

some wonderful doctors.



You may also want to look

into doctors who specialize

in your specific subtype

of cancer.

When you're introducing yourself

to a new doctor,

you'll want to start by sharing

a bit about who you are,

because you're much more

than just your diagnosis.

You'll know if you're having

good communication

with your doctor

when you feel heard, when you

feel that your doctor is never

rushed, and they listen to you,

when they consider your input,

and when they take the time

to answer your questions.



Before starting your treatment,

you'll want to seek out

a second opinion.

Don't worry about offending

your current doctor.

A good doctor will totally

support you as you begin

your health journey.

Ultimately, it's your health

journey and you need to feel

total peace of mind

with how you start it.

When it comes to honesty,

you'll want to be very

upfront with your doctor.

Your doctor is not there

to judge you, they're there

to listen.



Before going

into your first

doctor's appointment,

try to avoid doing

your own research.

That may feel counterintuitive,

but your doctor will be

able to give you the most

up-to-date and realistic,

factual information.

Googling can just create anxiety

and overwhelm.

And you don't need that

right now.

Either avoid researching

yourself, or ask a loved one

to do a bit of researching

for you.

And also remember

that your story is your own.

Someone else's story

of their metastatic diagnosis

is not yours.



When discussing early treatment,

it's vital that you bring up

any questions you have regarding

how your treatments are going

to impact you financially.

Your doctor may not be the one

to answer those questions,

but they can certainly direct

you towards the person

on your team, maybe

a social worker or a

nurse navigator

who can help you figure out

and break down exactly what

your treatments are going

to cost you.



If you're having a hard time

understanding something

that your doctor has explained

to you, don't let it go.

It's OK to ask them to

repeat themselves.

It's OK to ask them to break it

down for you because they may

have explained it in terms

that you're not familiar with.

It's also OK to ask for

more information

so that you can take it home

with you, perhaps a pamphlet,

and digest it later.

You can also ask to speak

with a nurse navigator who may

explain things to you better,

or have a bit more time to have

an in-depth conversation.



It can be very

intimidating to be in a room

full of doctors who have spent

years studying a disease that

is new to you.

But just remember that you are

the expert in your body.

You're the only one living

in it.

Who knows what symptoms and side

effects you may experience.

So always bring up what you're

feeling, whether physically

or emotionally, to your team,

and push until you get peace

and the answers that you need.



Some helpful ways to remember

what was discussed

during a visit

are to bring a loved one.

It's always nice to have

a second set of ears

and another brain

to help remember what

was discussed.

You may also want to take notes.

You can do that

with old-fashioned pen and paper

or in a notes app.

You may also ask permission

to record so that you can play

back and really remember what

went on in your visit.



I highly recommend connecting

the doctors on your care team.

You may think

that your oncologists

and your therapists

don't need to know each other,

But all of these people

are caring for you

as a whole person.

So it's important

that your primary care physician

is in touch

with your oncologist,

and that they both are in touch

with any mental health

specialist you see.



[MUSIC PLAYING]



<p><span>Deltra James, metastatic breast cancer patient advocate</span></p>/delivery/aws/8e/eb/8eeb173b-9549-4e18-b95f-b838e8a09bec/a9d734cc-1c36-4ef5-b5a4-8853a79b5c71_SF427804_1_visit-guide-mbc-intent1_VIM_,4500k,2500k,1000k,750k,400k,.mp401/15/2025 12:00:00 PM00photo of video thumbnail/webmd/consumer_assets/site_images/article_thumbnails/video/metastatic-breast-cancer-01.png35a644a3-ad32-4da2-bb76-2b96f7632681

 


If your breast looks red or swollen, there’s no need to panic. A tender area or rash on your breast often signals a common problem such as an infection. In other cases, it's a symptom of a common, treatable skin condition.

Rarely, a rash and soreness can be signs of inflammatory breast cancer, a form of the disease that can grow quickly, often in weeks or months.

Here’s how you can tell what's going on.

Infection

Infection of breast tissue, also called mastitis, is most common in people who are nursing. It can happen when milk gets trapped in your breast. You might also get it if something clogs one of your milk ducts or bacteria gets into your breast through a cracked nipple.

Mastitis often happens within the first 6 to 12 weeks after you give birth, but sometimes you can get it even when you're not breastfeeding.

If you have mastitis, your symptoms may come on without warning. Common signs include:

  • Tender, warm, or swollen breasts
  • A red patch of skin, often in a wedge shape
  • Pain or burning when you breastfeed
  • A fever of 101 F or higher
  • Chills

Skin conditions

Several common skin conditions can cause a rash anywhere on your skin, including on or under your breasts. They include:

Hives. These itchy welts on your skin often result from an allergy. They can be red or skin-colored, depending on your complexion.

Psoriasis. It causes scaly, itchy patches of skin. They show up when your immune system goes haywire and attacks your body.

Scabies. Bites from the human itch mite cause this condition. The bites form a line of little bumps on your skin and get really itchy at night.

Shingles. This shows up as painful, itchy blisters. It results from the same virus that causes chickenpox.

Intertrigo. This is the name for what happens when the skin under your breast rubs together too much, trapping moisture and creating friction. It may cause a smelly rash under your breast. Besides a red or brown rash, your skin may swell and itch.

Yeast infection under the breast. Intertrigo allows the candida fungus that lives on your skin to grow too much, leading to an itchy rash where skin touches skin. You can use an over-the-counter antifungal cream for a yeast infection under the breast. Or your doctor can prescribe a stronger one.

Nipple eczema. It can lead to a rash around one or both of your nipples. The skin around them may get dry and scaly, or you could have a rash that feels moist to the touch. You may notice a burning feeling if you’re nursing. Nipple eczema often affects people about 5-6 months after giving birth.

Ancanthosis nigracans. This rare condition may cause black or brown spots under your breast. The spots may feel velvety. They may itch and sometimes smell bad. It’s not serious, but it can be a sign of prediabetes. So see your doctor if you have these symptoms. 

Heat rash under the breast. You can get this type of rash when sweat lingers on your skin or if you have a blocked sweat gland. It may feel prickly, mildly itchy, and may hurt a little. You might notice groups of little bumps that look like pimples.

A couple of types of cancer can cause rash-like symptoms on your breasts

Inflammatory breast cancer symptoms result from a buildup of fluid in your breast. Many people don’t feel a lump. Instead, you may notice a rash that looks like an insect bite.

You could also have:

  • Itching that doesn’t go away
  • A nipple that goes inward or gets flat
  • Swelling and redness that affect at least a third of your breast
  • Pink, purple-red, or bruised skin
  • Skin that looks ridged or pitted like an orange peel
  • A sudden increase in breast size
  • Breast tenderness or a "heavy" feeling
  • Swollen lymph nodes under your arm or near your collarbone

Paget’s disease is a rare skin disorder that’s often linked to breast cancer in the tissues behind your nipple. It can cause a red, scaly rash. You could also have discharge or bleeding from your nipple.

What do breast cancer rashes look like?

An inflammatory breast cancer rash doesn’t look the same in everyone who has it. Sometimes it doesn’t even look like a rash.

You might see a rash that looks like red spots on your breast. On some skin tones, it can look dark or purple. 

But in some cases, you might just notice that the pores on the skin of your breasts look larger due to swelling. Or you might see redness or discoloration.

A rash caused by Paget’s disease usually looks like eczema on one of your nipples. The skin may look flaky or crusty, and you may notice oozing. 

Sometimes it looks like a small sore, or you might see inflamed, scaly patches of skin that resemble psoriasis. The rash might extend out to the aureole, the patch of darker skin that surrounds your nipples.

You may notice rashes on your breasts and other parts of your body during pregnancy, mostly because of the hormonal changes happening in your body. 

Pruritic urticarial papules and plaques of pregnancy (PUPPP)

This condition, also known as polymorphic eruption of pregnancy (PEP), can cause you to develop a rash on your breast during pregnancy. The rashes from PUPPP often start from the belly and can spread to other parts of your body, including your breasts. The rash may look pink, red, or the same color as your skin, depending on your skin tone. The itching from the rash may be too uncomfortable, affecting your daily functioning and sleep. 

PUPPP often affects first-time pregnant people during the last trimester of pregnancy. It’s unlikely to happen again in later pregnancies.

No one knows why it happens, but it could be due to different things that come with pregnancy, such as hormonal changes and your belly growing bigger. Your doctor may recommend corticosteroid creams and allergy medicines such as antihistamines to ease your symptoms. 

Pregnancy-induced eczema

Changes in how your immune system works and the hormonal changes that happen during pregnancy to protect your unborn child can trigger eczema symptoms or worsen them. This pregnancy-induced eczema can cause you to have intense itching. You may have other symptoms such as rashes that ooze fluid or bleed, dry skin patches, bumps, itching, and thickened or hardened skin.

Your doctor will be careful about prescribing medicines for you for the safety of your developing baby but may recommend moisturizers, corticosteroid creams, and antihistamines to manage your symptoms and control the disease.

Circulating hormones

A hormone called estrogen may also be to blame if you have a rash on your breasts when you’re pregnant. The placenta, the organ that connects your baby to your uterus and delivers nutrients and oxygen, releases this hormone around 5 days after conception and then again around 9 weeks into the pregnancy. Estrogen helps maintain pregnancy, but it can also cause rashes and itching in some pregnant people.

Talk to your doctor about any rashes you notice or any other skin symptoms. They will recommend the right treatment for you.

See your doctor if any of your symptoms get worse. They’ll do an exam to figure out what’s causing your rash so they can recommend the best treatment. Some simple rashes go away quickly with a cream you can apply to your skin.

Your doctor may want you to get a mammogram. This can give them a better idea of what’s going on inside your breast.

If your symptoms don’t clear up soon, your doctor may also want to do a biopsy. They’ll remove a small piece of your breast tissue and look closely at it under a microscope.

If you have a breast infection, you’ll need antibiotics. Make sure you finish all your medicine, even if you start feeling better right away.

Unless your doctor suggests otherwise, you won’t need to stop nursing if you have mastitis. Try to fully empty your breasts so you’re less likely to get an abscess -- a pocket of pus that may need draining. Drink plenty of fluids and get lots of rest to help your body fight off a breast infection.

Signs that you should call your doctor right away include:

  • Fever
  • Intense pain
  • Red streaks coming from your breast
  • Yellow or green pus
  • Open sores

Because so many different things can cause breast rashes, they’re not always preventable. But you can take steps to avoid some types.

To prevent mastitis:

  • Let your baby empty one breast fully before moving to the next.
  • Make sure your baby latches on well.
  • Alternate your breastfeeding position each time.
  • Consider seeing a lactation consultant.

To avoid intertrigo and yeast infections:

  • Wash the area under your breasts with a gentle cleanser two times a day, then gently pat dry with a clean towel.
  • Choose a well-fitting bra made of cotton or another natural material.
  • Maintain a healthy weight.

To prevent heat rash:

  • Wear loose, breathable clothing, especially when it’s hot.
  • Apply antiperspirant underneath your breasts.
  • Stay hydrated and don’t let yourself get overheated.

Having rashes on your breasts can make you feel uncomfortable and concerned, but they aren’t usually caused by a serious problem. An infection or a common skin condition is often the culprit. In rare cases, they may be caused by breast cancer. Your doctor may treat it based on what’s causing it. See a doctor if your symptoms seem serious or are long-lasting.

What do breast cancer rashes look like?

Breast cancer rashes look like insect bites or bruises. They may be pink, purple, red, or discolored and cover a large part of the entire breast. The rashes could also cause itching and pain.

What does a stress rash look like on the breast?

Stress rashes on the breast appear as raised, red, or skin-colored, and itchy bumps called hives. They can also appear on other areas of your chest.

Can a bra cause a rash on the breast?

Your bra could cause a rash if you’re allergic to the material it's made of.

Is it normal to have a rash on your breast?

You can get skin rashes anywhere on your body, including your breasts. Because it’s an area where skin can rub together and get sweaty, the skin under your breasts is prone to intertrigo, yeast infections, and heat rash.

When should I be worried about a rash on my breast?

Breast rashes are rarely serious. But see your doctor if you have a rash along with:

  • Pain or fever
  • A rash that blisters or oozes
  • Swelling in the lymph nodes of your neckor underarms
  • A lump in your breast
  • A nipple that’s flat or appears inside-out
  • Skin that resembles the peel of an orange

How can I prevent rashes on my breast?

You can prevent minor breast rashes by:

  • Keeping the skin around your breasts dry and clean
  • Wearing breathable tops and bras
  • Keeping your weight at a healthy level