A breast lift — also known as mastopexy — is a surgical procedure performed by a plastic surgeon to change the shape of your breasts. During a breast lift, excess skin is removed and breast tissue is reshaped to raise the breasts.You might choose to have a breast lift if your breasts sag or your nipples point downward. A breast lift might also boost your self-image and self-confidence.A breast lift won’t significantly change the size of your breasts. However, a breast lift can be done in combination with breast augmentation or breast reduction.