Thank you for your question!
Breast lift, or mastopexy, is a procedure performed for droopy breasts that usually occur after breastfeeding or with age. It seeks to remove excess skin laxity and reposition the breast tissue and nipple/areolar to a higher, more aesthetic-looking location. However, it does not add volume to the breast, although the breast may appear to be “fuller” or perkier after the mastopexy procedure. An implant may still be required to add volume to the deflated breast in addition to the mastopexy; this is more accurately termed augmentation mastopexy.
In selected cases, a breast implant alone may be all that is required to create the lift need for a droopy breast.
To determine whether you require a breast lift/mastopexy, an augmentation mastopexy or a breast augmentation alone, it is best that you are examined by a fully-qualified plastic surgeon, who would then be best placed to advise you.
I hope this has been helpful!