What can I do to fix loose skin and fat right under and around the armpit? (photos)

The skin laxity in the axilla is a common problem that I see in my practice and most always will require excision and tightening of the excess skin. The scar can be placed in the natural fold under the arm but will often extend slightly anteriorly and posteriorly past the crease where it may be visible in sleeveless tops. Most patients consider the slightly visible scar to be a good trade for the skin laxity problem, however. This problem usually results from some extra breast tissue in the area that enlarges with pregnancy or hormonal stimulation (often birth control pills), and then involution with weight loss or cessation of breast feeding. Thank you for sharing a very common problem.

I would suggest having liposuction in this area performed first. There is always a moderate skin retraction post liposuction. Excising skin in this area leaves some visible anterior and posterior scarring.
Dr. T