Glossary

Term · Feeding Your Baby

plugged duct

A blocked milk duct in the breast that causes a tender, firm lump. It often clears with frequent milk removal. If it does not clear, it can progress to mastitis.

In plain words

A plugged duct is a blocked milk duct in the breast. You may feel a tender, firm lump or a sore spot, sometimes with a small white or yellow mark on the nipple. Milk may be slow to flow from that area. Plugged ducts are common, and many clear with frequent feeding or pumping, warmth, and gentle massage. They can be mistaken for or . Mastitis includes fever, chills, and feeling unwell. Call your provider the same day for fever or chills, red or hot skin, or a lump that does not ease. Your provider can tell you what is happening.

The deeper version

A plugged duct is focal ductal obstruction causing a firm, tender area without systemic illness. The differential for a painful breast after missed sessions includes engorgement, plugged duct, and inflammatory or . ABM Clinical Protocol #36 (2022) distinguishes these by focal firmness, erythema, systemic symptoms such as fever and chills, and response to improved milk removal, and advises evaluation when systemic features are present. Management focuses on effective milk removal, gentle massage, and avoidance of pressure. Persistent plugs may progress to or abscess, and recurrent plugs often signal an issue with latch, pump fit, or milk removal.

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Sources

  • Academy of Breastfeeding Medicine — Clinical Protocol #36: The Mastitis Spectrum, Revised 2022

The Mothership Topic Wiki is general information for mothers and the people who care for them. It is not medical, legal, or mental-health advice and does not create a provider relationship. Experiences posted by members are their own. In an emergency call 911. If you are having thoughts of harming yourself, call or text 988.