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)
I got blocked milk ducts like clock - work but I kept pumping. (babycenter.com)
That said, there are plenty of time - tested techniques for improving milk flow, clearing blocked milk ducts, and more. (babycenter.com)