There are some unfortunate women who after having babies develop loose breast skin. There are some who have large breasts that get pulled down by gravity. No matter what the cause the breasts can be lifted by removing excess skin. Much of the excess skin is removed by making the areola smaller and removing a vertical ellipse of skin on the bottom of the breast. This surgery leaves a scar shaped like a lollipop. The scars never go away but they fade with the years.
The top of the breast is still flat in most cases and some ladies choose to have implants to fill out the breasts so they look a lot better.