When breasts become smaller after breastfeeding they usually do not recover naturally, i.e. they cannot be restored by conservative methods. The mammary glands shrink to varying degrees after breastfeeding, and the skin loosens somewhat. If breasts become smaller after breastfeeding or if there is sagging of the breasts, this cannot usually be corrected by conservative treatment, but only by surgery, i.e. breast augmentation. If there is a problem with sagging breasts, a breast lift may be required. The specific type of breast augmentation can be either autologous fat injection or implant surgery, each of which has its own advantages and disadvantages. Autologous fat injections are usually preferred by more patients, do not use implants, are simpler to perform, and can achieve liposculpture at the same time. Patients need to be clear that injected fat does not have a 100% survival rate and may require multiple injections to achieve better results. If breast augmentation is done with implants, the desired result can be achieved in one go, but there may be scarring from the surgical incision and implants may be needed. It is necessary to choose the appropriate surgical method according to the actual situation, such as the size of the breasts, etc., under the advice of the doctor.