Mastitis: Why We No Longer Tell You to "Massage the Blockage Out"
If you've ever searched online about mastitis, you've probably come across advice to have a hot shower, massage the lump firmly, use a vibrating toothbrush, pump until the breast is completely empty or try to force the "blocked duct" out.
For many years, that was the standard advice.
But our understanding of mastitis has changed dramatically. We now know that much of this advice can actually make the inflammation worse.
Understanding what's happening inside your breast makes it much easier to know what will help, and what won't.
Your breasts are incredibly delicate
When you're breastfeeding or pumping, it's easy to imagine your breast as one big bag of milk with a blocked pipe somewhere inside it.
The reality is much more amazing, and much more delicate.
Your breast is made up of hundreds of tiny milk-producing sacs called alveoli. I often describe them as looking like little clusters of raspberries. Each tiny "berry" produces milk before it flows into an intricate network of ducts that carry it towards the nipple.
Those ducts don't stay the same size. As they travel towards the nipple, they become progressively smaller and narrower.
Understanding this simple piece of anatomy explains why our advice around mastitis has changed so much.
Are your ducts actually blocked?
For years we used the terms "blocked duct" or "plugged duct", and many people still do today. However, we now understand that in most cases there isn't a solid plug of milk sitting inside the duct waiting to be squeezed out.
Instead, the breast tissue becomes inflamed. That inflammation causes swelling around the ducts, making them narrower and reducing how easily milk can flow.
Think about what happens if you sprain your ankle. It becomes swollen, painful and difficult to move. Not because something is physically blocking it, but because the surrounding tissue is inflamed.
The same thing happens inside the breast.
If you try to forcefully massage the breast or "push the blockage out", you're not squeezing a plug through a tube. You're pressing on delicate, inflamed tissue.
Because the ducts naturally become narrower as they approach the nipple, aggressive massage can actually push milk backwards into the smaller branches of the breast, increasing pressure and worsening the inflammation. It can also bruise those tiny raspberry-like clusters of alveoli, causing further tissue damage.
Your breasts respond much better to kindness than force.
The goal isn't to force the milk out.
The goal is to reduce the inflammation so the milk can flow normally again.
What causes mastitis?
Mastitis usually begins with inflammation rather than infection.
There are many reasons why inflammation can develop, including:
- Milk not being removed effectively because of latch or pump issues
- Oversupply
- Sudden changes in feeding patterns
- Pressure on the breast from things like a tight bra, underwire, baby carrier, silver cups or sleeping position
- Wearable pumps that don't fit correctly
- Nipple damage
Sometimes the inflammation settles quickly. Sometimes it progresses and bacteria begin to overgrow within the inflamed breast tissue, leading to infective mastitis.
Signs and symptoms
Early inflammation may cause:
- A tender or painful area of the breast
- A firm lump or swollen area
- Redness
- Warmth
- Pain while breastfeeding or pumping
- Milk not flowing as well from part of the breast
As symptoms become more severe you may develop:
- Fever
- Chills
- Body aches
- Flu-like symptoms
- Feeling generally unwell
- Increasing redness or swelling
Inflammatory mastitis vs infective mastitis
One of the biggest changes in recent years has been recognising the difference between inflammatory mastitis and infective mastitis.
Inflammatory mastitis
Inflammatory mastitis occurs when swelling within the breast narrows the milk ducts, making it harder for milk to flow. This creates increased pressure within the breast, leading to more inflammation.
The priority is reducing that inflammation so milk can move normally again.
Infective mastitis
Sometimes bacteria begin to overgrow within the inflamed breast tissue. This is known as infective mastitis and is when antibiotics may be needed.
Signs that suggest infection include fever, chills, feeling generally very unwell, worsening symptoms or no improvement after 24-48 hours of appropriate anti-inflammatory treatment.
What is mammary dysbiosis?
Another newer concept is mammary dysbiosis.
Just like your gut and your skin, your breast has its own natural community of bacteria. Most of the time these bacteria live in balance and cause no problems.
Sometimes that balance changes, allowing certain bacteria to become more dominant. This can contribute to ongoing inflammation, recurrent mastitis or repeated episodes that don't seem to fully resolve.
Research into mammary dysbiosis is still evolving, but it helps explain why some people experience recurrent mastitis despite doing everything "right."
Why the old advice has changed
For many years parents were encouraged to use heat, massage deeply, use vibrating massagers, pump until completely empty and try to force the "plug" towards the nipple.
We now know this often increases swelling rather than reducing it.
Remember those tiny raspberry-like clusters of alveoli? They're delicate. Deep massage can bruise them, increasing inflammation and causing unnecessary tissue damage.
Repeatedly pumping until the breast is completely empty can also stimulate your body to make even more milk, increasing pressure within an already inflamed breast.
Inflamed breasts need less force, not more.
What should you do instead?
The first priority is to calm the inflammation rather than trying to empty the breast.
One of the most effective treatments is surprisingly simple: ice.
Apply an ice pack wrapped in a cloth for around 10 minutes every hour while symptoms are significant. Continue until the breast feels noticeably softer and more comfortable.
If you're able to take it safely, ibuprofen can also help by reducing the inflammation itself. Take it with food and follow the advice of your healthcare provider or pharmacist.
Continue breastfeeding or pumping as you normally would. There's no need to try to completely empty the breast. Gentle, regular milk removal is far kinder to inflamed breast tissue than repeated attempts to "drain" the breast.
If the breast feels swollen, gentle lymphatic drainage can help move excess fluid away from the inflamed area. The important word here is gentle. This is nothing like deep massage. If pressing hurts, you're pressing too hard.
For some families, treatments such as therapeutic ultrasound or kinesiology taping performed by trained clinicians may also help reduce inflammation and improve comfort.
When should antibiotics be considered?
Not everyone with mastitis needs antibiotics.
However, if you develop a fever, chills, feel generally unwell, your symptoms continue to worsen or you haven't noticed improvement after 24-48 hours of appropriate anti-inflammatory management, it's important to seek medical assessment.
At this stage antibiotics may be needed to treat infective mastitis.
If symptoms continue despite treatment, your healthcare provider may also assess for a breast abscess, which requires further management.
Can I keep breastfeeding?
Yes.
In almost every case it is safe, and encouraged, to continue breastfeeding or feeding your baby expressed breast milk while you have mastitis.
Your milk remains safe for your baby, and continuing normal milk removal helps support your milk supply while the inflammation settles.
Finding the cause matters
Treating the inflammation is only half the story.
The next question is: why did it happen?
Sometimes the answer is obvious. Other times it might be a subtle latch issue, ineffective milk transfer, a pump flange that's too large, oversupply, pressure on the breast or changes in your feeding routine.
If the underlying cause isn't addressed, mastitis is much more likely to happen again.
This is where working with an IBCLC can make a real difference. Rather than simply treating each episode, we assess breastfeeding or pumping, identify what's contributing to the inflammation and create a plan to reduce the chance of it returning.
Your breasts work incredibly hard.
When they're inflamed, they don't need more force.
They need less pressure, less swelling and a little kindness.