Clogged milk ducts can be identified as small, red tender lumps on the tissue of the breast. Clogged ducts can cause the milk to back up and lead to infection. The best way to unclog these ducts is to ensure that you’ve emptied as completely as possible. You should offer the clogged breast first at feeding time, then let your baby empty it as much as possible.
If milk remains after the feeding, the remaining amount should be removed by hand or with a pump. You should also keep pressure off the duct by making sure your bra is not too tight.