I Have a Painful, Hard Breast - Is It Engorgement or Mastitis?
A clear guide to the three conditions that cause breast pain while breastfeeding - how to tell them apart and exactly what to do for each.
Three Conditions Compared
Engorgement, blocked duct, and mastitis exist on a spectrum - and can progress from one to the next if not treated. The key distinguishing factor is fever.
| Condition | Area Affected | Pain | Fever? | Skin Changes |
|---|---|---|---|---|
| Engorgement | Whole breast, often both | Generalised heaviness and tightness | Usually none (low-grade possible) | Smooth, shiny, hot |
| Blocked duct | Localised area or lump | Sharp or aching lump, tender to touch | None or very low | Possibly red over the lump |
| Mastitis | Wedge-shaped area, one breast | Hot, red, intensely painful area | Yes - usually above 38.5C | Red, hot, swollen wedge pattern |
Timeline of progression
Engorgement that is not relieved can lead to blocked ducts. Blocked ducts that are not cleared within 24-48 hours can progress to mastitis. Mastitis that is not treated with antibiotics within 24 hours can develop into a breast abscess requiring surgical drainage. Early intervention at each stage prevents progression.
Engorgement: Causes and Treatment
Engorgement typically peaks on days 3-5 after birth when mature milk comes in, but can also happen when feeding frequency suddenly drops (returning to work, sleeping through, illness).
What to do for engorgement
- - Feed or express milk frequently (every 2-3 hours) - this is the primary treatment
- - Use reverse pressure softening before latching: press fingers around the areola firmly for 1-2 minutes to push fluid back, making latch easier for baby
- - Apply a warm compress for 1-2 minutes just before feeding to encourage letdown
- - Apply a cold pack (frozen peas wrapped in cloth) after feeding to reduce swelling
- - Ibuprofen (if no contraindications) reduces inflammation and pain - safe with breastfeeding
What NOT to do for engorgement
- - Do not apply heat for extended periods - increases swelling
- - Do not pump or express to full relief - signals body to produce even more
- - Do not bind the breasts tightly - can cause blocked ducts
Blocked duct: additional steps
For a localised blocked duct lump, in addition to the above:
- - Position baby with their chin pointing toward the lump during feeds (chin creates most suction)
- - Gentle massage from the lump toward the nipple during feeds
- - Sunflower lecithin supplements (3600mg per day) can help prevent recurrence by reducing milk "stickiness"
- - A physiotherapy referral for therapeutic ultrasound can help resolve persistent blocked ducts - this is available at some Singapore physiotherapy clinics
Mastitis: Treatment and When to See a Doctor
Mastitis is a bacterial infection of breast tissue. The bacteria most commonly come from baby's mouth (Staphylococcus aureus) entering through a cracked nipple.
See a GP or polyclinic within 24 hours if you have:
- - Fever above 38.5C
- - A hot, red, wedge-shaped area on one breast
- - Flu-like symptoms (aches, chills) alongside breast pain
Antibiotic treatment
First-line antibiotic for mastitis in Singapore is typically flucloxacillin (covers Staphylococcus). For penicillin allergy, alternatives include erythromycin or co-trimoxazole. All are compatible with breastfeeding. The full course (usually 10-14 days) must be completed even if symptoms improve within 48 hours - stopping early increases recurrence risk.
Continue breastfeeding through mastitis
This is counterintuitive but important: continue feeding on the affected side. Your milk is safe for baby (the infection is in breast tissue, not the milk ducts themselves). Stopping feeding causes milk to pool, making the infection worse and increasing abscess risk. Feed frequently, especially from the affected side.
When Mastitis Becomes an Abscess - and Preventing Recurrence
Signs of a breast abscess (emergency)
An abscess develops when mastitis is not treated or does not respond to antibiotics. Signs include: a fluctuant (fluid-filled) lump, worsening pain despite antibiotics, continued high fever after 48 hours of antibiotics. A breast abscess requires surgical drainage - do not delay seeking care. This can be done at:
- - KKH A&E or Women's Clinic (24 hours)
- - NUH Women's Centre
- - SGH Breast Surgery
- - Private hospitals with breast surgery: Gleneagles, Mount Elizabeth, Parkway East
| Prevention Strategy | Why It Helps |
|---|---|
| Good latch from the start | Cracked nipples are the entry point for bacteria |
| Feed or pump frequently | Stasis (milk sitting) is the primary cause of blocked ducts and mastitis |
| Avoid tight bras and underwire | Pressure on ducts causes blockages |
| Vary feeding positions | Drains different ducts; prevents repeated blockage in same area |
| Treat blocked ducts within 24 hours | Prevents progression to mastitis |
| Probiotics (Lactobacillus fermentum or salivarius) | Some evidence for reducing recurrent mastitis - available from pharmacies in Singapore |