This is due to a process called breast involution, where the milk-making system inside the breast shrinks because it is not needed anymore. When the tissues inside the breast shrink, and the skin surrounding it doesn’t, the breast can look “empty” and saggy. Over time, some fat is deposited back to the breast, so it will look somewhat fuller, but sagging usually remains.
This is a loss of volume of the breast, while the breast “envelope” remains the same size. Because the breast appears empty, this condition is often confused with ptosis. However, it is different from breast sagging because technically the nipple-areolar complex and the Inframammary Fold have not sagged. The procedure to correct Empty Sac Syndrome is the placement of an implant.
