Thanks for your question. After a BBL procedure, it is crucial to minimize or avoid sitting for prolonged periods. The reason is that the fat has not integrated to your tissues and sitting may cause trauma to the newly placed fat so the process of blood vessel ingrowth, which is necessary for fat survival, may be disrupted. I recommend that my patients minimize sitting for one month and use a donut-shaped pillow (boppy pillow) or a bbl pillow to minimize the trauma from sitting. But one should still minimize sitting if possible. After one month, I allow my patients to sit regularly although many continue to avoid it for several weeks. I suggest you confirm with your plastic surgeon what he or she recommends. Please always consult with a board-certified plastic surgeon. Take care, Moises Salama M.D., Board Certified Plastic Surgeon