Quick read
Key points
- 1
A blocked milk duct happens when milk isn't draining properly from part of the breast, often due to infrequent feeding, poor latch, pressure from tight clothing, or missed feeds. It usually causes a tender, sometimes lumpy area in the breast, and can occur on one or both sides.
- 2
Topic-specific prevention and risk reduction will be added during the article-specific evidence audit.
- 3
The lump doesn't improve after a couple of days of self-care
01 · Know
What is Blocked or Narrowed Duct While Breastfeeding?
A blocked milk duct happens when milk isn't draining properly from part of the breast, often due to infrequent feeding, poor latch, pressure from tight clothing, or missed feeds. It usually causes a tender, sometimes lumpy area in the breast, and can occur on one or both sides.
It's common, especially in the early weeks of breastfeeding, and usually resolves within a day or two with simple measures. If left unaddressed, a blocked duct can sometimes progress to mastitis, so it's worth acting on early.
02 · Understand
Clinical context
Frequent, effective feeding is the main treatment
Continuing to feed frequently, starting on the affected side, and ensuring a good latch are the most effective ways to clear a blocked duct.
03 · Act
When to See a Doctor or Lactation Consultant
- 1The lump doesn't improve after a couple of days of self-care
- 2You develop a fever, chills, or flu-like symptoms (possible signs of mastitis)
- 3The area becomes red, increasingly painful, or hot to the touch
- 4You're finding breastfeeding consistently painful and would like support with positioning or latch
04 · Prevent & manage
Practical steps
Continue Breastfeeding — Don't Stop
Continuing to feed, rather than stopping, is important for clearing a blocked duct and preventing it from progressing to mastitis.
- 1Feed frequently, starting on the affected side.This helps drain the duct most effectively while your baby is hungriest.
- 2Apply warmth before feeding.A warm compress or warm shower before feeding can help milk flow more easily.
- 3Gently massage the area while feeding.Massaging toward the nipple can help encourage drainage of the blocked area.
- 4Check positioning and latch.A lactation consultant or public health nurse can help if you suspect latch is contributing to the problem.
- 5Avoid tight clothing or underwire bras.These can put pressure on the ducts and contribute to blockages.
Medical information notice
Health education, not individual medical advice
BarnMD Health Library provides general health education for public health literacy. Reading this article does not establish a doctor-patient relationship and this information is not a diagnosis, prescription, or personalised treatment plan. If you have symptoms or concerns about your health, seek appropriate advice from a qualified healthcare professional. If you develop emergency warning signs, seek urgent or emergency medical attention.
BarnMD Bottom Line
A blocked duct is common and usually clears within a day or two with continued feeding and simple self-care.
If fever or worsening redness develops, this may be mastitis, which needs prompt medical attention.