Mastitis: A Comprehensive Guide

Overview

Mastitis is an inflammation of breast tissue that sometimes involves an infection. It most commonly affects women who are breastfeeding (lactation mastitis), but it can also occur in women who aren't breastfeeding and, rarely, in men.

Prevalence: Mastitis affects approximately 10% of U.S. mothers who are breastfeeding, with the highest incidence occurring in the first 6-12 weeks postpartum (NIH). It's one of the most common complications of lactation.

The condition can be painful and disruptive, but with proper treatment, most women recover quickly. Early recognition and treatment are key to preventing complications.

Symptoms

Mastitis symptoms can develop quickly and typically affect only one breast. Common signs and symptoms include:

• Breast tenderness or warmth to the touch - Often in a wedge-shaped area of the breast
• Breast swelling - The affected area may feel firm or hard
• Pain or a burning sensation - Continuous or while breastfeeding
• Skin redness - Often in a wedge-shaped pattern
• Fever of 101°F (38.3°C) or higher - Often with chills
• General malaise - Feeling tired or run-down
• Enlarged lymph nodes - In the armpit near the affected breast
• Nipple discharge - May contain pus (in infectious mastitis)

Symptoms can appear suddenly and may include flu-like symptoms such as fever and body aches. The affected breast may appear red and feel warm, tender, and lumpy.

Causes and Risk Factors

Mastitis is primarily caused by:

1. Milk stasis - When milk isn't properly removed from the breast, it can become backed up (engorgement), leading to inflammation
2. Bacterial infection - Bacteria from the skin's surface or baby's mouth can enter the breast through small cracks in the nipple

Common Risk Factors

• Breastfeeding challenges:
  • Infrequent or missed feedings
  • Improper latching technique
  • Rapid weaning
  • Using only one position to breastfeed
• Physical factors:
  • Cracked or sore nipples
  • Wearing a tight-fitting bra or putting pressure on the breast
  • Previous bout of mastitis
  • Fatigue or stress
• Other risk factors:
  • Poor nutrition
  • Smoking
  • Diabetes or chronic illness
  • Use of a manual breast pump (when not cleaned properly)

Non-lactational mastitis can occur due to:

• Breast trauma or injury
• Piercing or tattoos on the breast
• Chronic conditions like diabetes
• Smoking (which damages milk ducts)
• In rare cases, breast cancer or other underlying conditions

Diagnosis

Mastitis is typically diagnosed based on a physical examination and medical history. Your doctor will:

• Examine your breast for redness, swelling, and tenderness
• Check for fever and other signs of infection
• Ask about your symptoms and breastfeeding practices

Tests That May Be Ordered

• Breast milk culture - To identify the specific bacteria causing infection (if infection is suspected)
• Complete blood count (CBC) - To check for signs of infection
• Ultrasound or mammogram - If there's concern about an abscess or if symptoms don't improve with treatment
• Biopsy - Rarely, if there's suspicion of inflammatory breast cancer (especially in non-lactating women)

It's important to distinguish mastitis from other conditions like plugged ducts or breast abscesses, which may require different treatments.

Treatment Options

Treatment for mastitis focuses on relieving symptoms, clearing any infection, and maintaining breast milk supply.

Self-Care Measures

• Continue breastfeeding - Emptying the breast is crucial. Start with the affected breast or pump if nursing is too painful
• Frequent nursing - Feed every 2 hours or more often to keep milk flowing
• Proper positioning - Ensure baby is properly latched to empty the breast effectively
• Warm compresses - Apply before nursing to help with milk flow
• Cold packs - Apply after nursing to reduce pain and swelling
• Gentle massage - From the affected area toward the nipple during feeding
• Rest and hydration - Get plenty of fluids and rest to help recovery
• Pain relief - Ibuprofen or acetaminophen can help with pain and fever

Medical Treatments

• Antibiotics - If infection is present (commonly dicloxacillin, cephalexin, or clindamycin for 10-14 days). It's safe to continue breastfeeding while taking most antibiotics prescribed for mastitis
• Antifungal medications - If a fungal infection is suspected (less common)
• Drainage - For breast abscesses that don't respond to antibiotics (may require needle aspiration or surgical drainage)

Alternative Approaches

Some women find relief with:

• Probiotic supplements (like Lactobacillus fermentum)
• Lecithin supplements to prevent recurrent plugged ducts
• Acupuncture (though evidence is limited)

Note: Always consult with your healthcare provider before trying alternative treatments.

Living with Mastitis

Managing mastitis while continuing to breastfeed can be challenging. These tips can help:

Daily Management Tips

• Nursing schedule - Feed on demand, at least every 2-3 hours
• Position variations - Try different breastfeeding positions to ensure complete breast emptying
• Comfort measures - Wear loose, comfortable clothing and avoid underwire bras
• Hydration and nutrition - Drink plenty of fluids and eat a balanced diet
• Stress management - Practice relaxation techniques as stress can affect milk flow
• Support system - Don't hesitate to ask for help with household tasks or baby care

Breastfeeding with Mastitis

It's safe and important to continue breastfeeding with mastitis. In fact, stopping suddenly can worsen the condition. Tips for comfortable nursing:

• Start feeds on the unaffected breast to establish let-down, then switch to the affected side
• Use a nipple shield temporarily if latching is painful
• Try the "dangle feeding" position (baby lying on back, mother leaning over to feed) to help with drainage
• Express milk if baby isn't emptying the breast completely

Prevention

While not all cases of mastitis can be prevented, these strategies can significantly reduce your risk:

Breastfeeding Techniques

• Ensure proper latch - Work with a lactation consultant if needed
• Vary breastfeeding positions to ensure complete breast emptying
• Allow baby to completely empty one breast before switching to the other
• Avoid long intervals between feedings
• Wean gradually to prevent milk buildup

Breast Care

• Keep nipples clean and dry
• Use lanolin or other safe nipple creams to prevent cracking
• Avoid tight-fitting bras or clothing that puts pressure on the breasts
• Change nursing pads frequently to prevent bacterial growth

General Health

• Stay hydrated and maintain good nutrition
• Get adequate rest
• Manage stress levels
• Treat any skin conditions on the breasts promptly

For Non-Lactating Women

• Avoid smoking
• Maintain good breast skin hygiene
• Seek prompt treatment for any breast injuries or infections
• Manage chronic conditions like diabetes effectively

Complications

When treated promptly, mastitis rarely leads to complications. However, if left untreated, potential complications include:

Breast Abscess

A collection of pus that forms in the breast tissue. This occurs in about 3% of mastitis cases and requires drainage (either by needle aspiration or surgery) in addition to antibiotics. Signs include:

• A hard, painful lump that doesn't improve with antibiotics
• Persistent fever despite treatment
• Redness and swelling that worsens

Recurrent Mastitis

Some women experience multiple episodes of mastitis. This may indicate:

• Persistent bacterial colonization
• Underlying ductal issues
• Need for evaluation of breastfeeding technique

Sepsis

In rare cases, untreated mastitis can lead to sepsis, a life-threatening infection that spreads throughout the body. Symptoms include high fever, rapid heart rate, confusion, and extreme illness.

Mammary Fistula

A rare complication where an abnormal connection forms between milk ducts and the skin surface, leading to persistent drainage.

Early Weaning

Painful mastitis can lead some women to stop breastfeeding earlier than planned, which may not be ideal for mother or baby.

Additional Resources

For more information about mastitis, consult these reputable sources:

• Mayo Clinic - Mastitis
• CDC - Mastitis Information
• NIH - Mastitis Overview
• Cleveland Clinic - Mastitis
• WHO - Breastfeeding Information