A breast lift is often desirable when from pregnancy, weight changes or the effects of gravity and aging there has been sagging of the breast tissue. Generally, the breasts appear low on the chest, the nipples/areolas are low on the breast and often the areolas have increased in diameter.
A breast lift (mastopexy) is designed to raise the breasts on the chest wall, lift the nipple-areola complex to the front and center of the breasts and often reduce the diameter of areolas. The mastopexy basically reshapes the breast to improve the projection (make them perkier) and aesthetic appearance and to restore the form it had before the sagging (ptosis) developed.
Generally, a breast lift is most beneficial when the nipple areolar complex is below the point where the lower part of the breast joins the chest wall. It can, however, in a modified fashion be used to correct some forms of breast asymmetry or reduce excessively large areolas.