How long does breast lumpiness associated with clogged milk duct last?

Few days: If you are breast feeding and you have experienced lumpy tender breast/breasts as you are learning to breast feed, you may have mild engorgement. If you have pain and fever call your OB about need for medication. If no fever, try pumping breasts for 3-5 minutes before breast feeding to get milk flowing and unclog ducts. Usually 2 or 3 days of this before feeds will resolve problem.