Inflammatory vs Bacterial Mastitis: What's the Difference?
If you've been told you have mastitis, you may have noticed that advice about treatment seems to be changing. Some people are encouraged to rest and manage inflammation, while others are prescribed antibiotics.
So why the difference?
Our understanding of mastitis has changed over recent years. We now know that not all mastitis is caused by a bacterial infection. Understanding the different types can help explain why treatment recommendations may vary from person to person.
This is why mastitis care may nowadays include things like therapeutic ultrasound, osteopathic support and rest as part of treatment, not only antibiotics.
So what is inflammatory mastitis and how does it differ from mastitis caused by a bacterial infection?
What Is Mastitis?
Mastitis is painful inflammation within the breast tissue that may or may not involve a bacterial infection. It most commonly affects breastfeeding women, due to blocked milk ducts or nipple damage, but it can develop at other times too.
Common symptoms may include:
breast pain
swelling
redness
warmth
firmness
feeling generally unwell
fever or flu-like symptoms.
These symptoms can range from mild to severe and they should never be dismissed.
What Is Inflammatory Mastitis?
Inflammatory mastitis occurs when inflammation develops within the breast, but the inflammation isn’t due to a bacterial infection.
It may occur when milk isn't moving efficiently through part of the breast, leading to increased pressure within the milk-producing tissue of the breast. This build-up in pressure results in inflammation as the body reacts to the pressure. Research suggests that changes within the breast's normal microbiome may play a role, although we're still learning exactly how this occurs.
People with inflammatory mastitis may experience:
a painful, swollen area of the breast
redness and warmth
a firm or tender lump
mild fever or feeling generally unwell.
For people with mild symptoms, current guidelines often recommend a period of conservative management before antibiotics are considered. This may include continuing to breastfeed according to your baby's needs, rest, staying hydrated, managing discomfort, and monitoring your symptoms closely. If symptoms aren't improving within 24 to 48 hours or become more severe, further medical assessment is recommended.
What Is Bacterial Mastitis?
Bacterial mastitis develops when bacteria infect the inflamed breast tissue.
Because the symptoms are very similar, it isn't always possible to tell the difference between inflammatory and bacterial mastitis based on symptoms alone.
When deciding if it’s bacterial or inflammatory mastitis, the following factors are considered:
how long you've had symptoms
whether symptoms are improving or worsening
whether you have moderate or severe systemic symptoms, such as a high temperature or you’re feeling very unwell
how you've responded to initial management.
When a bacterial infection is suspected, antibiotics are often recommended alongside continued breastfeeding where appropriate.
Why Doesn't Everyone Need Antibiotics?
One of the reasons mastitis management has changed is because unnecessary antibiotics aren't always helpful.
Current research suggests that people with mild symptoms who are otherwise well may improve with conservative management alone. Reserving antibiotics for people whose symptoms worsen or don't improve may help reduce unnecessary antibiotic use while still ensuring people who need them receive appropriate treatment.
What Else Can Increase the Risk of Mastitis?
Mastitis usually develops because several factors come together rather than from one single cause.
Some recognised risk factors include:
breastfeeding difficulties
nipple damage or trauma, which can be a result of poor latch or tongue tie
an oversupply of milk, also known as hyperlactation
previous episodes of mastitis
frequent breast pump use, particularly if it contributes to nipple irritation or oversupply. It may also be worth checking that your breast flange is an appropriate shape for your nipple.
At Pivot Osteopathy, we also consider whole-body factors that may influence breastfeeding comfort, including posture, neck and upper back tension, rib movement, and your baby's feeding mechanics. Sometimes babies with conditions such as torticollis or tongue tie may also benefit from assessment, as feeding challenges can affect both mum and baby.
Where Does Osteopathy Fit?
Osteopathy doesn't replace medical care for mastitis. Instead, we work alongside your GP, lactation consultant, midwife, and other healthcare providers.
Depending on your individual presentation, treatment may include:
hands-on treatment to improve comfort and movement
advice to support comfortable breastfeeding positions
gentle education around breast care and symptom management
assessment of whole-body factors that may influence feeding
assessment and treatment of your baby if feeding mechanics appear to be contributing to ongoing challenges.
Because every breastfeeding journey is different, treatment is always tailored to your individual circumstances.
When Should You Seek Medical Care?
If you're feeling increasingly unwell, develop persistent fever, notice worsening redness or swelling, or your symptoms aren't improving after 24 to 48 hours, it's important to seek prompt medical assessment.
Your healthcare provider can determine whether antibiotics, further investigation, or referral for additional care is appropriate. Occasionally, mastitis can progress to a breast abscess, which may require drainage, so ongoing symptoms shouldn't be ignored.
Looking for Support?
Mastitis can be painful, exhausting, and emotionally challenging, especially when you're caring for a new baby.
At Pivot Osteopathy, we work alongside your healthcare team to provide individualised support during your breastfeeding journey. If you're experiencing breast pain or mastitis and would like to explore whether osteopathy may be appropriate for you, we'd be happy to help.
Reference:
Louis-Jacques, A. F., Berwick, M., & Mitchell, K. B. (2023). Risk Factors, Symptoms, and Treatment of Lactational Mastitis. JAMA, 329(7), 588–589. https://doi.org/10.1001/jama.2023.0004
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