A plugged duct is when one or more of the milk ducts become blocked. It will feel like a hard, tender lump in your breast. Plugged ducts usually occur when a mother does not drain her breasts often enough or well enough. Plugged ducts are usually caused by incomplete emptying of the breast. A plugged duct can also be caused by stress, fatigue, or a tight bra. Some women are more prone to plugged ducts than others.
Because a plugged duct can lead to a breast infection, it needs to be unplugged as soon as possible.
WARNING: If you have breast redness, severe pain, or a fever and flu-like feeling along with your plugged duct, you could have a breast infection. Call your healthcare provider immediately.