Mastopexy does leave noticeable, permanent scars, although they will be covered by your bra or bathing suit (poor healing and wider scarring is more common in smokers). The procedure may also leave the breasts slightly uneven.

You can expect some loss of feeling in your nipples and breast skin, caused by the swelling after surgery. This numbness usually fades as the swelling subsides over the next six weeks or so. In some patients, however, it may last a year or more, and occasionally it may be permanent.
As with any surgery, there is always a possibility of complications or a reaction to the anaesthesia. Bleeding and infection following a breast lift are uncommon, but they can cause scars to widen. Whilst the majority of women do not experience complications you should discuss with your doctor any concerns you have in this regard.