Skin on the side of the breasts--how to address this
It would be helpful to have a little more detail from you, or even a photo. If you have just some loose skin, there are ways to excise it (cut it out). Usually, that type of excision involves a scar that goes from the lateral part of the breast crease towards the back. Sometimes, the excision can be done using a vertical scar on the chest, under the arm.
If you have a lot of fullness associated with this skin, you may benefit from liposuction first, or a...