A good friend of mine had an arm lift surgery a few years ago after she had gastric bypass. The thing is though that she has now lost even more weight *she looks AMAZING

* but since she lost even more weight since her first operation I think she could use another one. Is that even possible to do? Doesn't this operation involve cutting out a lot of important parts like muscle at stuff?
(I actually came to this plastic surgery forum to ask about something else but I'd figure I'd ask this while I'm here, too)