If your milk isn't able to flow out of a particular area of your breast, you may experience plugged milk ducts in that spot. (verywellfamily.com)
While pregnant, your body produces hormones to begin milk production, and is hard at work increasing the number of milk ducts in your breasts. (momtricks.com)
This helps to maintain a good seal between the breast shield and the breast and avoids pushing the edges of the breast shield into your breast tissue, which can cause blocked milk ducts. (wyattspharmacy.com)