BBL for small frame? I'm 5'3 and125 lbs, but it's so difficult to put on weight

Thanks for the question.  Photos would aid in evaluating if you have enough fat stores to augment your buttocks.  Multiple areas may be liposuctioned to obtain more fat.  An in office consultation would answer all of your questions.Best wishes.Dr T

Although you are 5'3" and 125 lbs, you may still be a candidate for buttock augmentation with fat transfer. There are many donor sites which need to be considered and how much of a buttock you have are also important considerations. You need to consult with a Board Certified PS with extensive experience performing buttock augmentation.