If you are breast feeding, chances are there will come a point where you will end up with a clogged milk duct. How will you know, you might be asking yourself? Trust me. You will know. Clogged milk ducts are very uncomfortable, almost painful. It feels like little pebbles or marbles are stuck inside of your breasts. If you find yourself with a clogged milk duct, you are going to want to fix it ASAP. Here are the steps I take when I have a clogged milk duct.