Abnormal breast physiology Mammary blocked duct 2024-02-04T07:18:17Z Blocked mammary ducts represent an area of localized milk stasis, typically associated with breast engorgement and resulting in a localized tender breast lump or area of blushed color; the breast may feel hot; and there may be a white, painful bleb on the end of the nipple. Galactocele Lactation duct obstruction