Difficult to make any recommendations without photos or more importantly a formal physical exam. The BBL procedure involves harvest fat from areas of your body where there is excess fat and injecting that fat carefully into the central zone of your buttock. In addition, it involves liposculpting the buttock to facilitate a more rounded look. The common donor sites for this procedure is your posterior waist/flanks, lateral thighs, back, waist, and anterior tummy. Please visit with a board certified plastic surgeon to learn more about your options.
Web reference: http://www.basuplasticsurgery.com