Can blocked milk duct cause mastitis?

Mastitis may begin as inflammation rather than bacterial infection. It can develop when milk is not moving well, but breast inflammation can have other causes and a tender lump does not by itself confirm mastitis.

A blocked or narrowed duct may feel like a sore, firm area or small lump. If milk builds up and surrounding tissue becomes inflamed, pain and swelling can spread. Mastitis more often causes a hot, swollen, painful area and may be accompanied by feverishness, chills, body aches, or fatigue. Redness can be less visible on brown or black skin.

Long gaps between feeds, pressure from tight clothing, oversupply, abrupt weaning, or ineffective attachment can interfere with milk drainage. Forceful massage can worsen tissue injury rather than clear the problem.

Continue breastfeeding responsively if you are able, without trying to repeatedly empty the breast beyond your baby's needs. If feeding is too painful, express enough milk for comfort or to feed your baby. Check positioning and attachment with a midwife, lactation consultant, or breastfeeding specialist.

Use a cool compress between feeds for swelling, rest, drink according to thirst, and avoid tight bras or pressure over the tender area. Ask a pharmacist or clinician which pain relief is suitable for you, particularly if you have medical conditions or take other medicines.

Contact a clinician if you feel systemically unwell, develop fever or chills, have spreading breast redness or worsening pain, or do not begin improving after a short period of gentle home care. Mastitis outside breastfeeding also needs medical assessment.

Seek urgent care for severe illness, confusion, faintness, rapid deterioration, or a very painful swelling that may contain fluid. A breast abscess may need ultrasound assessment and drainage, and bacterial mastitis may require antibiotics.

Ask whether the pattern suggests inflammation, infection, or an abscess; whether antibiotics are appropriate; which pain medicines fit breastfeeding and your health history; and where to get an observed feeding and latch assessment if episodes recur.