I had a bbl and after 2 years i feel all the fat is gone. If I were to do round 2 is it likely it would happen again?

Unfortunately i hear this similar story from patients at least twice a day. Chances are if it melted away the first time, not much will change the second (or third) time around. This is why many of these patients turn to buttock implants as the only relatively safe, reliable and permanent surgical option for buttock augmentation. Glad to help. 

Having the BBL done a second time is an option as long as the patient has enough fat to be transferred. The revision implies that there is less fat than the first time, and scar tissue will make the surgery much more difficult on the surgeon. The percentage of fat survival in the second BBL should be about the same as the first. The volume loss occurs over the first 6 weeks or so.  The buttock size should have been long lasting after about 3-6 months. After that period of time the volume remains stable assuming weight is maintained. Having before and after photos as well as current photos would have been helpful.

Dear hbunny13,
Fat viability depends a lot of surgeon technique. The fat has to be placed back into the buttocks as soon as possible so that it has a greater chance of survival. It has to be placed carefully so that not too much fat is placed in only one area. In most cases 30-50% of transferred fat is lost after the surgery. If you have enough fat tissue, revision surgery might be an option. If you are considering a surgery, I would suggest you to consult a board-certified plastic surgeon. Only after a thorough examination you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery