Does a blocked milk duct cause painful breastfeeding?

Milk can build up in part of the breast when drainage is reduced. This may create a sore, swollen or firm spot, and feeding or expressing can make that area feel more sensitive. The discomfort may be strongest at the start of a feed or when the breast is full. Pain can also have other causes, including nipple irritation, shallow attachment, breast inflammation or infection, so the pattern and other symptoms matter.

A blocked duct does not make the milk unsafe for your baby. Continue feeding if it is comfortable enough, while paying attention to how you feel and whether the breast changes improve.

Feed responsively and avoid long gaps if your baby is ready to feed. Check that your baby’s mouth takes in a deep latch rather than tugging mainly on the nipple. Use gentle breast support and a comfortable position; avoid forceful massage or pressing hard on the tender area, which can increase swelling. Rest, drink to thirst, and use a cool pack wrapped in cloth after feeding if it feels soothing. A lactation consultant can assess attachment and milk removal, while a clinician or pharmacist can advise which pain relief is suitable for you.

Contact a clinician promptly if you develop fever, chills, flu-like symptoms, spreading redness, increasing warmth, worsening swelling or severe pain. Seek advice if a firm area does not start improving, keeps returning, or you cannot feed because of the pain. Urgent assessment is needed if you feel very unwell, faint, confused or short of breath. These symptoms can suggest breast inflammation or infection and may need treatment.

Ask: Could my baby’s latch or feeding position be contributing to the pain? Does the tender area fit a blocked duct or another breast problem? What symptoms should make me contact you again, and which pain-relief options are appropriate while breastfeeding?