As gravity takes over, the breasts begin to sag. Add in skin changes, weight-gain or -loss and pregnancy, and it’s no surprise that your once-perky breasts are now in need of a little help. A breast lift, also known as a mastoplexy, is the only way to reposition the breast back to where it belongs. The goal of a breast lift is to restore the breasts to a higher, more youthful position. Most sagging results from overstretched skin and breast lift surgery removes the excess skin and tightens underlying breast tissue so the breast is supported in a higher position.