Is there an alternative to BBL for skinny girls?

Buttock implants are probably the only option given your lack of fat stores.
Intramuscular implants can improve volume by 400 cc or so, depending upon the size of the individual. A significant amount above this volume compromises healing by creating more tension on the healing incision.It is a rare individual in whom I cannot find enough fat to perform a BBL.  I have liposuctioned models and thin patients with good results.  Of course, I would need to see photos or examine you to determine if you fall into this category.Kenneth Hughes, MD, Board Certified Plastic SurgeonLos Angeles, CA

For those patients with a paucity of donor fat reserves, implants remain an option for buttock augmentation. While they have fallen out of favor with the rise of the BBL, buttock implants remain an option.Patients should be aware that unlike breast implants buttock implants are distinctly different. They are solid rather than filled which lends a less natural feel. The implants can be placed sub/intra-muscular or subcutaneously. However, the muscle plane is not as nicely defined as the submuscular space of the chest wall. Sizing can also be challenging as there is not correlate cup size for comparison. Additionally, some measure of fat grafting is preferred when using an implant to camouflage the borders of the implant. Thus thin patients may still be at a disadvantage due to the lack of available fat for transfer.On the plus side, the results are typically more reliable than fat transfer in which the outcome is wholly dependent on variable fat graft take/viability.As always, discuss your concerns with a board certified plastic surgeon (ABPS).